My ebay Deering Sierra just arrived. I keep calling it a Deluxe, since it has the same exact features of my Deering Deluxe 6-string from the same period. The only thing different is a satin finish instead of a glossy on.
It's been "rode hard and put up wet," but there is no irreparable damage. Minor belt-buckle indentations on the back of the resonator, and some varnish peeling along one edge of the fretboard, but those two things were mentioned in the ad.
What wasn't mentioned: First three frets are worn under the strings almost to the fretboard, but there isn't any fret buzz yet. Fretboard is filthy, head is filthy, and nearly worn through in places. Chrome is corroded through several places, especially the arm rest. The fifth-string spikes on frets 7 and 9, which I was counting on using, have been hammered down so hard that they can't be used. The previous owner probably never played in any key but G and considered them a nuisance when he went up the neck. So, not exactly abuse, but still. . . .
Neck seems very good, neck angle seems good, things seem nice and solid. Tuners seem fine. It's heavy, but you pay for that.
That said, if I spend a few hours cleaning it up, put ~$300 into replacing the worn frets, fixing the spikes, and other minor issues, it will still be cheaper than what everyone else was asking for their beat-to-heck ones. So I'll clean it up, try to pull the spikes up a little and see where it goes from there. Look for a review eventually.