In fact 0.844x$500 = $422 *1.19 (VAT) = $502 which is roughly 360 EUR to my place. Why should I buy from you at higher price and god knows the actual condition.
There are a lot drawbacks:
1) limited or no warranty compared to buying from bitmain
2) 40 Euro on top of the price
3) probably used since I can't imagine anyone getting new hardware and not plugging in

just my 2 cents....