I've instated a new rule for the classifieds; You must now post a price in the ad. Doesn't have to be in the title, just in the ad somewhere, and it needs to be relevant. Posting $1000 for a used Glock just because you're too lazy to look up a price is not relevant.
It is still OK to ask for offers, i.e. $550 OBO.
If you are looking to trade, post WTT (Wanting To Trade). You don't need a price for WTT.