3.5k is an "ok" price to pay for a running one. yes i bet its as rotton as mine under the skin, but if someone can fix it up themselves like me (ie no labour charges) then it will be worth doing if they buy it around that price IMO.
definatly a project though - you probably wouldnt want to use it much until some things are sorted on it.
remember these are around £7k to £15 for a pre-facelift one in very good nick. - even then i'd be skeptical.
as i've said before my one came from a well known/respected specialist dealer just two years before i got it - all the rust would of been there then, and all the horrible bodged repairs i've had to remove and redo.