The ones who say it's not worth over 10k are probably the ones who want to buy it and bringing the perceived market value of it down will help them buy it for cheaper
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Everyone should try and get as much money for their stuff, the value of it depends on the saturation of said item in the market, and the sellers urgency to sell it
[You must be logged in to view images. Log in or Register.] A patient seller will probably get 12-16k for this i reckon.