Back to the basics:
300Euro is a quite normal price for a B2060 in europe, maybe a bit on the low side, but far from being "waaaaay to cheap".
Running into such a thread with that remark was just as uncalled for as other people running inot red's auctions claiming his goods were overpriced.
People wanting to sell should be allowed to set their own prices and the market should decide wether it's hot or not.
Such behavoiur is IMO only acceptable if prices are waaaaay out of line, like a noop selling rare stuff for pennies or someone selling a "rare" A1200 for 500Euro.