[CSBM5]

Finding a local buyer is the best bet to move the Pzeros. When I bought my M3 back in 2012, it came with nearly new tires I didn't want (CPO car, 16k miles), so I posted an ad in our local sports car club forum (track, autox, rallyx club) and had them sold in a day. In your case with the age of the tires and clear thermo-oxidative aging showing (car probably sat outside all day at the least), I'd price them to move and be done with them depending on measured tread depth. Maybe $350/set local pickup with 6/32s or more. If 5/32s or less, forget selling them.

Couple that sale with waiting until Discount Tire has their $100/set of four specials (usually 4-5 times/year), and the sting won't be too bad. Michelin/DT often also have the $70/set rebate running too. Hence 350+100+70 helps a good bit getting into a new set of tires.