Well you are reducing your options considerably by having those provisos and at a rough guess if you wanted leather and A/C in an S2 of those two colours I bet there are not more than a dozen in the country as A/C was pretty uncommon in S2's.
After that you have have to make all the usual 944 checks and the only thing extra on an S2 is wether the camchain has been changed recently. So many people stil don't know this is a wear and tear item and really should be changed every 50k miles to save lots of ££££££
As always buy on condition and not on specification, it is far better to buy a good model that doesn't quite tick all the boxes rather than a poor one with all the goodies you want. A/C can be retrofitted for around £2k
