just yesterday i was looking for the exact same thing. i first went through the ebay/yahoo stores etc but then i came across xcart. i have not yet launched th site but it looks to be pretty well put together so far and very easy to administrate. www.x-cart.com
i also went through a couple of the other carts out there and phpshop.org seemed to have promise but i had some install problems. ho hum.
[edited by: jatar_k at 1:18 am (utc) on Nov. 8, 2002] [edit reason] delinked [/edit]