Advice on landing pages

my web site versus seller landing pages

[rbacal]

Wondering if anyone has any thoughts. I sell my products thru esellerate, which is a combined payment processor, e-product download source, etc. My products have description pages both on my own website and esellerate.

Currently I have the esellerate urls as landing pages (they are less attractive than my website).

The question is: Does it make more sense to use the url's to the product pages on my website, OR the product pages on esellerate?

Right now they go to esellerate, so I'd have to change all of them to the individual website pages on my site. Anyone know if that would be a problem?

PS. Esellerate is by and large NOT spiderable, while my site is. I suspect that's important.