Yeah, that's a weird one. I was looking at that too. Almost all Merciers from that time period had contrasting lugs. The fork is not original, and the 531 sticker questionable. So me thinks a repaint. It looks cool though. Surprised he's asking so much. He had that Davis for $175.

It would be interesting to see in person.

I bought a couple bikes from this guy too. He has a lot of bikes. But all mediocre. Once in a while he gets a niceTrek. But mostly $175-225 range Schwinns and Raleighs.