Ive had a few. theyre cheap as shit because they break all the time. haven't seen many make it past 500 miles.
which means you can pick em up for nearly free - all of mine have been free or less (less as in one I bought for 50 came with a general tank I sold for $80)
yea theyre shit. buying one "new" would be idiotic. but if you're willing to fix shit they kick ass. riding anything is fun. have fun.