Seats for 2000 Boxster S

[Perfectlap]

Those are definitely replica seats. By the looks of the crest and stitching I'm going to say they were not made by aftermarket racing seat maker. So I'd say the stock seats are more valueable if both were new.
But since you are looking to trade used for used, then you should probably list them on Ebay to get a sense of what they're worth right now. Either way the stock seats are definitely safer in daily driving situations, those have been crash tested.

[Chuck W.]

Originally Posted by Perfectlap

Those are definitely replica seats.

I had a feeling, but my experience is not in GT3 seats. That puts a completely different spin on the post. I have no idea the worth of replicas, but I am guessing a straight swap for OEMs might be fair.