Back to the item you posted....that's almost half of what you could get for a Pro Staff Mid back when this thread was started.
lol at Jack & Coke saying "56kers beware" - that sounds almost as old as the rackets themselves.
LOL indeed.

That $550 price was a steal. The seller probably doesn't/didn't realize what the market might pay.
I'd be willing to venture if this same one is put up for sale again, it will garner a $1000 price tag. Not too shabby.