I have a new platinum (3 diamond) ring for sale. It was won on a regional radio programs competition. I have had it independantly valued at £2800 - £2900 and the radio comp was advertised as a £3000 ring. I was wondering where you would suggest I could sell/auction it?? never done anything over £100 really on E-Bay so was unsure about pitfalls (should I put a reserve on etc) any advice is greatly appreciated.