But I don't know if that is wise or not. Why do you think they need my Driver's license? What do you think with stuff like this?
My friend, in a fit of boredom (and because he's fortunate enough to be well off), sent off some gold jewelry he had valued at around $500 to Cash4Gold. They sent him back about $20.
So no, don't trust any sites like that. As a general rule, if it sounds too good to be true, it is.
They have to do this, because if some of the stuff you sell them turns up stolen, they turn the info over to the police.
Pawn shops do the same thing - they'll only buy off of you, with id, so stolen goods can be tracked. LOTS of people try selling stolen stuff this way.