Sounds like the OP's talking about a 590SP. A used A1 still runs about $350, on a good day. I've had a 590 and it was great. Sold it for a 590A1, which I'm a lot happier with (speedfeed stock, ghost rings, 18.5" over 20", so less front heavy). Solid gun. It makes me hesitate on any other pump gun.
Always carry an extra magazine when CCW. Friends don't let friends get a double-feed first round out.