Glanza or GT? It's real rare to find one that's not been royally thrashed by some twat... Depreciation is really not an issue what so ever as long as you keep it in good condition. Normal things, engine knocking, head gasket, bodywork, signs of accident damage, rust (they don't really suffer), gearbox (synchro's are common), clutch, rattles and bangs… Best to post car and spec up here we can tell you if we know it, and our opinions. £2k for a fairly stock car is pretty rare, but if your patient you'll find one.