The description is due to an online translation for sure. The Japanese often have phrases like this when converted like that.
Another is the bit in the description where it says "Please refrain from the tender of nervous one.' This is very typical of yahoo.jp listings and means 'dont buy if you wanted nos and new parts, this is a used item'. The Japanese are quite particular when selling things not to build up expectation and often parts are nicer than they say in the ads. They dont want to cause offence. Sadly in Aus that part would have 'Perfect condition, as new : would suit new parts buyers' written in it.... sigh.
Well the rebuild cost of a complete motor I'd say is 2k. What about the other 2k to buy the missing engine parts
Cranks are roughly a grand, cylinders are easily a grand, Heads 400, gearbox 500, clutch 250, gaskets (OEM head gaskets etc) 200, Rebore with pistons 350/450 depending on pistons, Powervalves 250 and thats if you can find the parts, They just dont come up that often.....
Oh, Clutch cover and water pump if they are missing, now they are a bitch to find