Paypal - how to let the buyer input how much they want to pay.

I am making a lowest unique bid site and therefore the buyer chooses their bid and then pays it via paypal to be entered. How do I create a paypal form that allows the buyer to choose how much they want to send?

I have found the donation function but I'm not sure whether you are allowed to use it when its not really a donation?

Thanks

 

Well, I assume your Bid Site has sort of a script. You can actually use the Paypal Buy Now button (without encryption) then you can populate the dollar amount and probably the Bid ID.

Log In to Paypal and go to the 'Merchant Tools' Tab and select 'Buy Now' button. Make sure to set this to 'No' for encryption.

Here are the sample codes which you can use

For the Buy Now button

For the Payment Link

https://www.paypal.com/cgi-bin/webscr?cmd=_xclick&business=payment%40yoursite%2ecom&[b]item_name=Bidding&item_number=PO001&amount=12%2e00[/B]&no_shipping=0&no_note=1&currency_code=USD&lc=US&bn=PP%2dBuyNowBF&charset=UTF%2d8

Code (markup):

You can just use your script to change the details in Bold based on what they enter in your bidding script.

 

Thanks, its just a basic site no scripts are used.

 

I tried that but everytime I try to test it it says - This session contains invalid data.

 

Well I got it working by opening the bid page in a new window which is pretty awkward:s

But theres no where to edit the amount you want to send?

 

Simply telling you can use the non encrypted button and generate the value amount dynamically with the script. Plus if it is something related to bids then it cannot be a basic site it will surely have some scripts that store the data of all the bids and would be calculating the things out.

Thanks.