Yeah, electrofusion bore. Many have had steel sleeves fitted by now.
Power valves are a weak point (the aluminium gears clog with carbon and strip the teeth off).
Clutches are crap by modern standards, as they're grabby and difficult to use smoothly.
Headlights are a bitch to get hold of - if you want one, then you'll probably have to buy some poxy modern aftermarket light.
Assuming its not completely hammered, $300 is a good price. Rough-but-reasonable examples seem to sell for $600~800 on Ebay.
If you don't want it, plese send me the seller's phone number!