Try to see the seats before they are removed if you can.

I looked at a LOT of 850 seats before I chose a nice set of gray cloth ones for my 544.

Many wrecks are pried open or have glass windows broken. Often cars sit with the doors open.

Leather seats do not weather well - all the ones that I found were stiff and faded.

The cloth seats that I chose were in a car with an undamaged interior that was weather tight. They are beautiful.

I like leather seats, but they are not all equal, we have a '95 850 that has soft supple leather, the rest of the other 4 bricks with leather seats that we have owned were a bit stiff.

See if you can find some 850R seats, they are delicious!

Good luck.
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'96 855R,'64 PV544 driver, '67 P1800 basket case, '95 855, '95 854, the first three are mine, heh, heh, 435,000 miles put on 9 bricks