If you are so keen to buy this car whynot get your own mechanic to check the carBEFORE you buy it.
Please read this forum and realise how much engine / gearbox/ clutchrepairs on one of these cars can cost you- normally third party warranties exclude lots of wear and tear and service items (like clutch friction material, dual massflywheels, gaskets fluids etc etc).
If the car needs a head gasket there is a reason - it has probably overheated while towing due to another issue and has been sold because of the repair cost.
Do you really believe that the vendor is going to do a proper repair job on such an old car and notmaximise his profit. He will probably bodge it up long enough to last 3 months and you will have no redress when it leaves you on the side of the motorway in a cloud of steam.
Why not find yourself a nice honest car without issues - there are plenty about.
57 Titanium 1.6 110 DPF, X Sport pack, panoramic roof,Sony 6 CD changer with voice control bluetooth.