Hello; Mike here. I have a fully built Bob Carpenter engine in my 08 Gen3. I am starting a build on a 2012 Gen 4 for next year, and I will be pulling the built engine out of my Gen 3 along with all the other aftermarket parts to put the bike back to stock to sell in the spring. I was wondering what you think would be a fair price for the complete engine. It has the Bob Carpenters 6200 dollar package in it. Kawasaki race crank, and rod bearings. The oil pressure relief valve has been shimmed for more pressure. The clutch basket has been welded. It has heavy duty clutch springs along with the release pin being milled slightly to allow more oil to the clutch. It also has the upgraded Gen 3 shift shaft installed. The engine has a new cam chain along with an APE billet cam chain tensioner. It has Carpenter J+E 3 mil piston kit, and the piston tops are polished, and piston ported. The cylinder head is a full race Carpenter head with 1 mm oversize Kawasaki race titanium intake valves, and stock titanium exhaust valves. It has Carpenter valve springs with carpenter titanium retainers. The cams are both 397 lift billet cams, and they are degreed in to Carpenters specs. The air injection is blocked off in the valve cover. The engine makes crazy HP, and especially Torque. The engine has 3800 miles on it since the build, and 1200 since being freshened. I am not looking for top dollar, just want to be fair. What do you think would be a fair price? I also have stock Throttle Bodies which have been bored to 46mm, and a PCV with full custom tune, and guhl flashed ECU which could be included for the ultimate turn key package. Engine is still in the bike, and fires right up every time, and runs great. I do have dyno sheets, time slips from the one time I took it to the dragstrip, and also a video showing it's performance to verify. I know this is a tough question, but what do you guys think price wise? Thanks. Mike.