I think it needs to be a WTB ad.
No easy way to tell by searching for "remington 870" whats what without looking at each one, even then they don't tell you what the sn is.
EDIT: and if you find one, post dibs here so we all don't end up bidding against each other
WTB: SWISS & German police trade in pistols
WTB: German made & proofed SIG P226R