I've actually sold a fair number of items here, but it does depend on what you have (Diesel Thanaz will probably sell better than women's Paige, for example). One perk of this site is that people who aren't members can still access the mall--I've gotten some traffic at my online boutique that way (people who don't want to bother registering but still want to buy stuff). I also like the individual item layout, which means buyers don't have to sift through huge superthreads full of stuff. I actually just sold an item today not even 24 hours after posting, and I sold another pair on Thursday. I think the key is to crosspost the items at multiple forums so they get the widest audience...different items will sell better at each forum.
ETA: I noticed you're selling a lot of size 28s...that's an odd size (37" hips, equivalent to a women's 7) so it'll be harder to sell those than the more common 27s and 29s. I have difficulty selling 28s myself for that reason.