When I weighed my manual passenger seat it was 45 lbs, and my full power drivers was 62.
That's about what I remember from my Gen 1 power and manual front seats.
Reclining aftermarket seats - decent, safe seats that you can sit in for a few hours, are going to be high 20's to low 30's for poundage, plus your stock seat mounts and sliders, or you may have to convert to an aftermarket seat mount and sliders, so add some more weight to account for that. Aftermarket mounts and sliders are going to add 6 to 8 pounds to the total weight per seat.
A good fixed back racing bucket in fiberglass or kevlar will be in the 15 to 17 pound range, plus mounts and sliders, figure mid 20's for poundage when it's all done.
If you can have a fixed back seat with simple fixed racing seat mounting brackets tied directly to the floor, you can keep the whole mess at 20 pounds, but it's going to be spendy; $700 or more per seat, and not very flexible for drivers besides yourself.
Here's some custom bracketry and sliders I fabricated to put Cobra Kevlar fixed back Suzukas in my SVO Mustang. Trust me, this weren't cheap, near $1K per seat when all was said and done, but the Suzukas are some damn comfortable and supportive seats, and they're FIA approved.
Raw Adapters__________Finished Adapters_________Finished bracket_________Seats in car
eBay seats, uugh... A lot of that stuff is ricer garbage: Steel tube frame seats made in China, questionable welding, no testing, no certification, no FIA testing or approval - Buyer beware, do your homework, and make sure you're getting something that will give you the same or higher degree of protection as the OEM seats if you get in an accident. The swoopiest seats on The Planet aren't worth a crap if in an accident they tear loose and make you the meat in a seat-steering wheel sandwich.
Are you getting seat bases and sliders with these seats? Guaranteed to fit the Taurus floor pan? If not, be prepared to embark on a fabrication adventure.
Honestly, I wouldn't buy a race seat that I couldn't sit in for awhile before I bought it, but that's me.