Depends on the buyer and if they are in decent shape. I build auto cockers and I usually pay about 100 bucks for these markers. Alot of guys buy them now and convert them into a pump. I would throw them on ebay or on the b/s/t.
Cougar is pretty much spot on here. The top one would hit 100 because of the barrel that goes with it. It's worth almost as much as the marker, and totals out around 100-120. The STOs are consistently 200, esp original and in decent, not perfect, shape. The bottom, I'd say 80-100 since it's missing the reg.
Put the benchmark frame on the STO (but keep that original frame) and rebuild the regs and pneumatics on it. Maybe put an adjustable hpr on it. Money. I would shoot the ish out of that gun. For bonus points get the SP barrel on it freak bored. Sell the rest.
Sandana: "Because Billy Ceranski wore one, and that dude was an OG killer."