Sorry, I know this forum is only for double guns but....

I have been offered an older Remington 870 Wingmaster in 28 gauge that is in very nice condition. It has fixed full choke, vent rib, 25" barrel. I am considering picking it up as a kid gun or to be used on rainy days.
Can anyone give me an idea of a reasonable price for it. Approx. 25 years old

Thanks