Had our first P1 for 3 years sold it with 69k on the clock, no problems, this included a trip to Corsica, Spain & home in a 3 week period however they need looking after, can eat engines, usual causes decats or induction kits without a remap
Treat the MAF as a service item, approx £75 & easy DIY job they can develop a fault not indicating a cel light, making the engine run lean, causing det & engine failure, also avoid high speed runs, e,g, silly speeds on the autobahn they are a sprint car, not something to run at 140 plus, we all know a P1 will go off the clock, & trust me it will, but a lot go bang at that point
OK that's the warning, not bad news, just common sense really the P1 is the best car we have owned, it tells you something that were on our second, it's got 112, 000 miles on the clock, but it's fun great raw, drivers car, loads of info here http://p1woc.co.uk need to register but no charge, great site and a friendly bunch
Good luck with your decision & if the car is standard with full Subaru history you should be fine, they are a terrific motor, but take your time there are a lo about be careful with your choice
If you get the build number, it's on a plate on the N/S/F strutt top, could even be a plaque in the car, if so deffo a P1WOC car as plaque not standard and made up for the club have a look in the register on http://p1woc.co.uk may be able to get in touch with previous owner