I've done plenty of trades on the forum, but always face to face.
If this isn't feasible i'd suggest you check the reputation of the seller through tracking their post history, have they sold to people before etc ? Has anyone created a thread about them in the [url="http://basschat.co.uk/index.php?showforum=23"]Feedback forum[/url] ?
If not, you really have to ask yourself if you trust this person based on your dealings with them so far, alas if you have reservations - it's best to let it go. If you do encounter problems however, we as moderators can attempt to mediate on any dispute, but cannot guarantee we will provide a result as we do not take any responsibility for transactions made by people on the forum. .