WIW: 1970 340 T/A Challenger seats

My friend parted out a 1970 Challenger 340 T/A back in the 80's (Edit: 1972 Dodge Challenger 340 4-speed). He put the seats in his 71 Nova SS and still has the car. Now he is restoring the SS and wants to sell the seats. They have the rails and everything attached to them still. He wants to sell them to put the money into restoring his car and asked me how to ask for them. They are pictured below, what are they worth, in this condition?
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