Buying a 106 gti

Hi all, this is my first post here as I'm just about to buy a gti but wanted some advice first.

I've found a 98 diablo red 106 gti with 64,000 on the clock, fpsh, half leather and sports exhaust. Everything seems to be perfect except the engine, although doesnt smoke, doesnt sound that smooth at idle plus its hunting a little bit, is this normal, expensive to fix etc?

Would really appreciate your help and any other suggestions or tips on what to look out for as I dont pick

thanks all

I Have A 106 Gti For Diablo Red 80.000miles Most Of These Are Motorway Miles 6 Months Tax 7months Mot Leather Interior Just Lowered Recently Koni Shocks And Avo Springs On The Front And Torsion Bar Adjusted At Back With G-max Shocks Excellent Stantard Gti Alloys Looking About £3000 For It How Much His The One You Are Looking At Going For..

Oh As For The Car You Are Looking At It Could Be Something Silly Like Oily Spark Plugs Or It Could Be Something A Bit More Serious Cars Are Pretty Much Like Girls You Dont No What To Expect...