[Gargoyle]

Wickes, I agree with Kick.

Don't destroy the check. Keep it safe - perhaps seal it in an envelope and post it to yourself or a friend and leave it sealed. This way you will have a dated postmark which will verify timescales on the whole thing.

Email the other parties and just state that you have not received anything and that you have sold your violin. Keep it polite and thank them for their time but finish by telling them you are no longer interested in any transactions. ie. leave the email closed so that they have no reson to reply to you.

If they get nasty or try to pressure you I would goto the authorities. Keep printouts of your email transactions.

Sell your violin and spend your $400 wisley. Don't get reeled in by the idea of quick easy cash!