Does look very tidy, good thing about it being over in portugal is there isnt going to be any rust which is half the battle with cars of that age.
Take it for a test drive to see if it feels solid over all. Check that there is no play between gears especially 1st, 2nd anr reverse, wear of the "syncro mesh" is a common trait with mark 1 and mark 2 GTI's.
Check that there is no blue smoke coming out of the exhaust when you rev it and check that there is no creamy sludge under the oil filler cap (head gasket problems if there is).
with those few things they are all tell tale signs of how good the car is.
EDIT: Welcome to the forum by the way aswell...........where are my manners?
