Check the RCU classifieds - e.g. http://www.rcuniverse.com/market/item.cfm?itemId=131166 - almost brand new AMT 180 for just $1500. Woj also has one for sale, though his does not seem to inlude a gsu, based on the photos in the ad (?). These engines require air-start though, so factor in the cost of a scuba tank and regulator when comparing these engines to any of the electric start variety.

Gordon