I agree--a personalized website is the value add. The issue I see is what is the breakeven on something like that? It will obviously cost something to put up your own site (not just money, but time). If I'm trying to sell stuff in a jam, do I think I'm going to get more page views on my own site than on CL? Is it going to be worth the extra time? Am I getting a better price for my stuff?

Also, it will be a bit of a pain if I need to update it each time something is sold.

Things I would consider adding: 1) ability to pay for the item directly on the site (you could partner with paypal on this, or offer the merchant service directly for a cost to the website user)

2) waiting list for people interested in the objects.

General issue I see with this: can you get people to pay for this when they have a free option? If you're going to offer it free, can you generate enough page views on individual sites to validate ad revenue?

Sorry... just my opinion.