2010 Auction M35

I'm alwan joined to auction but this year I'm feel is hard year if you want winning some items you must need more money but income not double up ,sometime you think is not fair e.g. wine ,watches ,coins & militaria collectibles (STOCK also) but another one  said is reasonable so you will lost the item. Last month I lost one item the name is Chinese KMT M1935 steel helmet , my maximal bid is US$5000.00 (my wife said reasonable is US$20.00!? ) but the ending about is US$6800.00   I don't how to say ! If you how to do the coming auction ?

(This picture is WARTIMES I'm copy him)