How much does a rebuilt 1978 honda twinstar 200cc motor cost?

i found a 200cc engine for a 1978 honda twinstar, which i am rebuilding, for 50 bucks. It runs and i dout i will find one for less but i was just wondering if anyone knew. Thanks!How much does a rebuilt 1978 honda twinstar 200cc motor cost?Sounds like a decent deal. It's a simple motor, easy to work on. The bike is old enough that you certainly wouldn't want to pay someone to rebuild it for you.