I used to be an active seller/buyer at the now-defunct Yahoo! Auctions Singapore (chalked up a rating of about 200) and several weekend flea markets around the island.
For want of a better auction site and a hassle-free way of selling, I've started posting stuff at my own virtual flea market, Bargain Buys (website: 2ndhandbuys.blogspot.com). All items are in good condition.
Items available for sale are:
> second-hand ladies' apparel for winter and summer, shoes and accessories
(brands like Levis, MNG, Zara, Warehouse, Rip Curl, Chomel etc.)
> random dvds
> random outdoor and picnic gear
> random electronics/electrical appliances
Most items are going for under $20. Do drop by if you're a bargain hunter!