what year car are they from?
also, what i said about the leather being on just the surfaces your body touches ids important. i say that because if the original owner did not specify all leather surfaces(dash, door panels etc) they will absolutley be partial leather. that is what they put in all 911s, turbos etc, even sport seats are partial leather unless ordered special. i am saying this to protect you, the std 911 seats should cost about $500-700 a pair with the premium on black seats, sport seats about 1000-1500 again with black being the expensive. full leather sports seats...i have sold 1 set in 20 years of parting porshes, out of a 89 911 turbo, black 2200 is what i got, if the seats you are looking at are from a newer (95---) with the circular sticthing, they should be cheaper(more commom and they do not fit earlier cars) the boxsters have this seat as well and it is always partial leather.(seen a few leather, but only with rest of leather package, look for leather around the speedo trim, if it is not ther, it will be partial on the seats) the diveing line between leather and vinyl is the beading or piping on the seat. Make sure you get a receipt for these seats!..... there are a lot of chop shops in your area(i am a parts rep for dealers and see the shops in your area) they are nice comfy seats