This might have already been covered, but i didn't locate any recent threads about it.
- Make it mandatory that the member posts a picture of the item, with his or her NS member name written on a piece of paper next to the item. I've seen this on alot of sites and it helps out ALOT. Mods could always enforce this....
- Require the member to state a price for the item, or at least state a range they are looking for. I'm not big into the "make an offer" thing.
Sorry if they have already been covered.