Hi there:
I am the queen of ebay if i do say so myself. I have designed and coded over 75+ custom listing templates and storefronts for ebay.
You can google me "designedbyjackie" to see some of them or see this link [login to view URL], you can also view my feedback here on GAF
Basically i would make the template look the same as your site, and create all the code and such for the listing. I am a certified ebay stores designer, my code will pass ebay filters with absolute precission