WordPress CSS - Borders Within Posts

I'd like to add borders around the eBay listings in my posts:
http://obsessionfitness.com/stamina...ecumbent-bike-quiet-inexpensive-space-saving/

The quote below is from another site owner using the same WordPress Plugin. I can't figure this out...or my template is different. Any help is appreciated.
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"The listings are put in tables automatically by PHPbay with the image being in one cell and the listing details in the other. So I just use CSS in the stylesheet to state what it should be.

For my theme each post is contained within a Div cell which has the class "post". So my stylesheet has the code:

.post td
{
border: 2px solid #FFEACC;
}

 

good! that's cool!!

 

Try adding this to layout.css:

table {
	border: thin solid #000;
}

Code (markup):

 

That worked. Thanks.

 

No trouble. Thanks for the rep.