Thats an OK price, but is a right hander though. I dont think i could adapt to it even if i tried. i think it would be all of a sudden like trying to convert to writing with the hand you dont normally write with
They are basically a Maico motor. Like all hi performance race engines, they can be tempermental and require a lot of attention which can be a pain if you cant afford the supply of spares and labout to fix. I would much prefer a CR/KX based bike where parts are pretty easy to get anywhere.
By the way, im not sure why its on that site. Its far from a 'vintage' outfit but i guess 99% of the guys there reading marks swapmeet wouldn't know anyway.