Voted yes - because they work, there's members on here I'll trade with by PM but that's because I have dealt with them before and trust them and I certainly wouldn't go whining to the mods if it went wrong (and if I did I hope they'd tell me where to go).
My only suggestion would be maybe a slight relaxation of the picture rule in the wanted section, for example someone posts up saying they want an Angel barrel but doesn't specify a particular make or price they would be willing to pay. It might be an idea if you could post that you had a particular make for a particular price then the buyer could state if they were interested (in which case a picture would then be required before any commitment to buy is made) or state that that's not what they are after.
The only reason I suggest this is, for low value stuff, it can be a pain to dig through your various kit bags to find something like an autococker ram that's only going to sell for say £10 to post a picture for the buyer to then say they wanted a different colour or model or something.