record breaking vw toy

i have a nice collection of tin vw's but this is the mecca

http://cgi.ebay.com.au/VW-split-window-Kdf-no-tippco-tin-windup-car-Guentermann_W0QQitemZ330472708590QQcategoryZ30QQcmdZViewItemQQ_trksidZp3286.m7QQ_trkparmsZalgo%3DLVI%26itu%3DUCI%26otn%3D3%26po%3DLVI%26ps%3D63%26clkid%3D5509021470387086264

Kinda funny how he won't tell the reserve and latter says it is 6000$ How would you put a value on something like that, should be at cristies or simmilar auction house (is that how to spell "cristies" ?)
also looks like it has a narrowed beam and has been lowered, maybe the maker was looking into the future. 🙅