Price aint bad but the miles are high - whilst I don't think this will be an issue in the main, it will effect resale values as you add more and more miles.
Also depends on the car, if it needs a set of tyres and anything like a clutch or discs and pads, you'll soon be heading towards the value of a lower miles car that was ready to go.
No harm in trying to haggle the price though if it is all ok and got to be one of the cheaper FRS's out there.