Juts make a page on your website with your sales blurb and add a PayPal Buy Now button. Is that what you mean?
This is called paypal custom payment page which you can find it here To start using Custom Payment Pages, go to the Custom Payment Page Styles page: From the Account Overview page, click on the Profile sub-tab Click on the Custom Payment Pages link under the Selling Preferences heading. This will take you to the Custom Payment Page Styles page. From this page, you can Add, Edit, Preview, and Remove page styles, as well as make any page style your Primary style Adding a Page Style You may add up to 3 page styles. To add a page style: Begin at the Custom Payment Page Styles page (see "Getting Started," above) Click Add Enter your page style preferences: Page Style Name (required) Enter a name up to 30 characters in length. The name can contain letters, numbers, and the underscore mark - but no other symbols or spaces. The Page Style Name will be used to refer to the page style within your PayPal account and in the HTML code for your PayPal Website Payment buttons. Header Image URL (optional) Enter the URL for an image that is a maximum size of 750 pixels wide by 90 pixels high; larger images will be cut to this size. The image must be in a valid graphics format such as .gif, .jpg, .png, and .swf. The image will appear at the top left of the payment page. We recommend that you enter an image URL only if the image is stored on a secure (https) server. Otherwise, your customer's web browser will display a message that the payment page contains insecure items. Header Background Color (optional) Enter the background color for the header using HTML hex code. The color code must be six digits long and should not contain the # symbol. If the Header Image URL is present, then the header will be a 750 pixel wide by 90 pixel high space at the top of the payment page. If the Header Image URL is not present, the header height will be reduced to 45 pixels. Header Border Color (optional) Enter the border color for the header using HTML hex code. The color code must be six digits long and should not contain the # symbol. The header border is a 2 pixel perimeter around the header space. Background Color (optional) Enter the background color for the payment page using HTML hex code. The color code must be six digits long and should not contain the # symbol. Click Preview to preview your page style, or click Save to save it When you next create a button, you will have the option to apply a page style to the payment pages associated with it. To do so, click Add More Options on the button creation page, and select a page style from the Custom Payment Page Style menu. Editing a Page Style To edit a page style: Begin at the Custom Payment Page Styles page (see "Getting Started," above) Click the radio button next to the page style you wish to edit Click Edit Keep or modify your page style preferences: Page Style Name (required) Enter a name up to 30 characters in length. The name can contain letters, numbers, and the underscore mark - but no other symbols or spaces. The Page Style Name will be used to refer to the page style within your PayPal account and in the HTML code for your PayPal Website Payment buttons. Header Image URL (optional) Enter the URL for an image that is a maximum size of 750 pixels wide by 90 pixels high; larger images will be cut to this size. The image must be in a valid graphics format such as .gif, .jpg, .png, and .swf. The image will appear at the top left of the payment page. We recommend that you enter an image URL only if the image is stored on a secure (https) server. Otherwise, your customer's web browser will display a message that the payment page contains insecure items. Header Background Color (optional) Enter the background color for the header using HTML hex code. The color code must be six digits long and should not contain the # symbol. The header is a 750 pixel wide by 90 pixel high space at the top of the payment page. Header Border Color (optional) Enter the border color for the header using HTML hex code. The color code must be six digits long and should not contain the # symbol. The header border is a 2 pixel perimeter around the header space. Background Color (optional) Enter the background color for the payment page using HTML hex code. The color code must be six digits long and should not contain the # symbol. Click Preview to preview your page style, or click Save to save it Previewing a Page Style To preview a page style: Begin at the Custom Payment Page Styles page (see "Getting Started," above) Click the radio button next to the page style you wish to preview Click Preview You also can preview a page style when adding or editing it by clicking Preview. Making a Page Style Primary When you make a page style Primary, it will be applied to all of your payment pages unless you specify otherwise. To learn how to apply a page style other than your Primary style, see "Overriding Page Style Settings," below. Begin at the Custom Payment Page Styles page (see "Getting Started," above) Click the radio button next to the page style you wish to make your Primary style Click Make Primary Click Make Primary to confirm your choice Removing a Page Style When you remove a page style, the payments pages to which the style applied will no longer be customized with those specifications. Instead, your Primary page style will be applied to those pages. If you remove your Primary page style, the PayPal page style will become Primary. Begin at the Custom Payment Page Styles page (see "Getting Started," above) Click the radio button next to the page style you wish to remove Click Remove Click Remove to confirm your choice Overriding Page Style Settings Your Primary page style will automatically be applied to all of your payment pages unless you specify otherwise. To apply a different page style, select the one you want when creating your Buy Now Button, Donate button, PayPal Shopping Cart button, or PayPal Website Payments button. Just click Add More Options on the button creation page, and choose a page style from the Custom Payment Page Style menu. To change the page style for a button you have already created, you can modify the button's HTML code. Replace the value of the "page_style" variable with the Page Style Name of the style you wish to apply. The next time the button is clicked, its payment pages will appear in the new style. Specifying the "cs" and "image" variables in the button code will also override your Primary page style.