7k will get you a decent 55 or 06 plate with 60-80k, FVWSH. All the buying guides advise to go for manual at this budget, and I'd go Interlagos cloth for the full GTi experience.
18" Monza'a are a must, but make sure thee rims are not kerbed, and the tyres have a rim protector edge, as it's so easy to kerb these. If your Mrs is going to drive it, maybe get the 17" monzas, as they are not diamond cut finished, and a lot cheaper to repair.
Also check to see if cam follower has been changed, Cambelt and waterpump at 60K / 4 yrs.
Good luck and welcome to the site!