I bought two of those from the same seller 'engine only'.
I think I paid $175/ea w/ free shipping. Its a Mitsubishi TU43, a nice quiet reliable 2 stroke, but not high powered.
Its got less power than the Tanaka PF4000 & Tanaka PF3300.
I left them stock, sold one on a scooter & still run one on my daughters stand-up scooter.
-Lowracer-