Anyone know anything about this?

There’s an ad in today’s paper about a “salvage stone sale” this weekend on Park Point, at 3101 Minnesota Ave.

The ad refers to a Web site. The site says:

“Own a piece of history: Brownstone, limestone, slate, marble, granite… An incredible collection of historic building elements including benches, capitals, finials, etc.”

Does anyone know if someone is pulling apart an old house out there? Is this someone’s collection of garden decorations? Just a vacant lot these sellers had access to? Are these things from old buildings here in Duluth?