I don't know if this will help anyone here but this seemed like a fair price for new. It is however a 1800 RPM engine so maybe just pump and generator use? I doubt it will go in a RTV
https://www.surpluscenter.com/Engin...il&utm_term=0_53f2243a04-1daa6f740c-139923273
https://www.surpluscenter.com/Engin...il&utm_term=0_53f2243a04-1daa6f740c-139923273