that's like the same specs as mine was. I sold mine for the same too... 500 is a bargain.
easy to repair. so long as it's just a runabout you'll prolly be happy.
Parts can be a bit steep, cos it's valeo parts and they're a rip off, but scrappers are rarely short of a few spares.
Starts getting expensive when you want to "get more out of it" (i.e. modifications). I personally never had ANY trouble with my Clio. There were occasions that it needed fixing, but it's an old car and it was things like the heater broke (i replaced the motor for £10 easy as pie) and bits of rust (easily sealed with some wax)
My mate bought it from me and then complained that he kept having to replace the clutch ( I had it for over 18months and never had to replace the clutch so I reckon it was his driving).
Other than that, they're a bit windy in the cab (not very airtight), the leccy windows are only held up by litle bits of plastic, but assuming you don't mind the godsawful sticky stuff, it's just a matter of takin off teh door cards and clipping it back on.
EDIT: oh yea, and some knob tried to steal my fogs and broke the bumper, also the bumper can break easily (i broke it on a rose bush).
Hope that helps.