If the belts were done 6 years ago I would want to factor in doing them again - This is purely my opinion but I'm always overly cautious
As mentioned in my other post the description sounds great and has the common issues listed as done - gearbox refurb, R26R Clutch and SMF, new front shocks, Discs and pads look pretty new (hubs not rusty etc), Airtec intercooler, RSTuning map etc.
I've only really skimmed over the adverts and briefly looked at what's for sale currently so don't really want to say which I would or wouldn't go for but if you could get a deal on the £7600 one, and the history, receipts, car actually looks good in person and drives well then it seems great value, I would be at least viewing it if it was within my budget