Wanted: Small Engine for go-kart. STX

I am looking for a gas engine to power a small go kart, roughly 5hp preferred but smaller or larger ok. Anything out of a kart, scooter, old generator, mini bike, tiller, etc would probably work. Pull or electric start ok. Doesn't have to be working if the price is right and it worked in the past. Prefer to spend under $100, but if you have something nice that is running maybe we can still work a deal. Horizontal shaft preferred. Honda, Briggs, etc. Broken scooters, mini bikes, etc considered as well.
Let me know if you have one to get rid of! On STX. PM me.
Thanks!