Centaur - I recall looking at a nice one near my place around 5 years ago. I tried to buy it from the owner (cash), but he wanted the auction to run. It sold for $4800 ish. Then there was a flurry of dealers listing their Centaurs for $5000 +. None sold (of course). The next Centaur on eBay sold for $3600, then the next one struggled to $2200. Centaur is a desired game that fluctuates in price depending on demand. I'd suggest that a nice one would fetch $2500 + in today's market.
....Ha.... I struggled to pay the $2200!