Think it was the previous owner who just treated the bike like ****...
You can pick up a 1996-1998 F650 for about a grand, it's not a bad bike and will do 60mpg. Rotax single cylinder engine with dual spark plugs is pretty much bulletproof, but the paint around the engine casing peels really badly. Top speed is 115 mph.
Buy a white one, add some fluorescent stripes on the fairing and look at the surprised faces on car drivers when they realise you're not a police bike!