Hello and WOW £3500 thats a good amount of cash for a GTi?!
If you your looking for a GTi dont forget you might want to put your own mark on it, wheels etc.. so maybe spending 2k on a nice 16v in your chioce of colour(black), 90 spec, PAS, would allow for lots of other stuff ie suspension upgrades or even just an overhaul of existing parts or donate the left over cash to me for my car

Also maybe worth looking on autotrader and local papers every night as cars sometimes get put on the net straight away thats how i got mine

an hour old advert!! Or VIEW a few on Ebay but take someone with you, maybe someone of here would look with you?
Good Luck Dave