Yeah those are great. I'm into the older ones like I had when I was a kid.
Z50's and such. Below is a link to a forum that needs some action.
Bought my 13yr old one last Christmas...125 4-stroke for $300.00 + shipping(Ebay)
It was his first bike and he's a little guy...so I thought why spend the x-tra money on something that he'll out grow in a year.
Well...It's a almost a year later and he's moved up to a Yamaha YZ85 2-stroke
I know a couple of Pro-Circuit guys that race Pits during the off season...needless to say the bikes they're riding costs a hell of allot more than my son's $300 Chinese copy