Trying to sell it, here of all places, for 600 is more insulting than anything i could say.
And i wasnt even being insulting. I have over paid for things, most of us have. It happens (as you know).
And feeling like 600 was "a deal" at the time, i can only assume its because you are comparing that amount to artificially inflated ebay prices. So good job, score one for the gougers for fooling somebody. If you want to recoup 600 of the 700+ you bought it for, then take it to a site where that is expected.