Maybe ask him what he has to have out of them individually or all together.I had a co-worker a couple months ago that wanted to sell a gp100 6'' stainless.He said he never used it and wanted to buy a shotgun,he said he bought it from a friend for 300.He knew I was interested and asked if I would give him what he paid for it.I said sure,so you never know what's on their mind everyone is different.Your in the ballpark on the new ones,around here they're close to 499 I believe in 6'' and stls.The other two I can't say.