Given the serial numbers, they sound like second generation Colt revolvers. If so, the 1860 Army in mint condition, in its box, with its paperwork, has a value of $600.00. In the same condition, the Dragoon is worth $450.00. Knock $100.00 off if the packaging is gone or damaged.
If the backstrap has Sam Colt's signature stamped in it, then the gun is a "Signature Series" model and not worth your trouble, and definitely not worth $975.00.
And, finally, yes they are real, genuine, American made Colts. Colt says so. Collectors say so. The prices say so. But $975.00 is way too much. You can find them for more reasonable prices on auctionarms or one of the other on-line auction houses. It pays to shop around. Good luck.