If u say the price is different Nino, I have no reason to doubt you at all.  But i can truthfully say that I did 1 million percent today get a ebay email from Joe definately stating the $4200 price. Perhaps he added a 4 instead of a 3 at the start of the number.   ( I have sent u Nino a copy of the ebay message I recieved) 

Of course the seller will want to keep the price inflated. It is within his (or the companies) best interests to keep the market value high. What would be the chances that the seller MAY have another BK2000 for sale in the future. It's exactly the same as the infamous eBay KISS machines - sellers claim that they are worth $10,000 - but do you know for a fact that they have ? Is there any proof ?

No, the buyer will not sell his BK2000 - he loves the game