as g star said, if you buy a shitter they will go pop, buy something with compression tests and that has been treated well, mine came with a box full of receipts, it needed some tidying up but it was a good runner!
the engine is so simple when you get your head around it, 3 moving parts and thats it! the e shaft and 2 rotors! they rev to 9k, the tips will wear down, in the same way piston rings will wear down eventually, but they are easy to work on and there are dvd's to show you how to do a home rebuild its that simple... however it prob works out better going to a propper builder who gives you 12 months warentee on the engine that way if it fails its replaced free!
and to the post saying the wankel sounds flat?? are you mad lol? a stock wankel on a straight through exhaust sounds sexy as f**k lol, a wankel with a bridge or periphial port sounds even sexier lol!
gstar i prefer the jap rear plate... and i dont have a dangly fog, my fog is in the second reverse light