I'm assuming we're talking aboot an 1100, eh?
I just purchased an 11-87 12 ga light contour barrel with tubes for $900 in exl. condition. I know 20 ga goes for more money but not sure how much, maybe 2-300. I'd say $1100 depending on condition with choke tubes. That's what I would be willing to pay. The difference between any of the newer guns is the alloy receiver vs the steel receiver on the older Remington's. There's a reason they went out of business. Just cost more to build them with steel. Happened to all the American shotguns. Winchester, Ithaca and Remington were the standard in this country for a very long time. I have a 1970 Wingmaster that I just won't part with. First new shotgun I could afford.
You might be waiting a long time to find a friend or neighbor who just wants the cash without the hassles of dealers or advertising it. Lightning does strike people but not very often. I've sold a few that way and the buyer got a good deal. The buyer with the money was standing right in front of me. Sold.
None of this is relevant if you just want a lead delivery system.