For a print that will be framed, behind glass, I question whether a viewer could even tell whether it's FB or RC. Perhaps some of the master printers around here could, but I wouldn't bet I could. And if the RC print could sell for, say, 1/2 the price because it requires so much less resources to produce (faster exposure, faster development, faster wash, dries flat and smooth), it'd be a lot more likely to wind up on my wall. Certainly, I'd like assurance that the print will still be in good condition in 20-50 years, but it seems RC paper isn't as bad, archivally, as was suspected when it was new (or the newer papers are better than the old).
As for glossy vs. matte, to me, glossy is what tells me it's silver gelatin, even if it's behind glass. If I see a matte print, I'm not certain, but if it's glossy, and I don't see bronzing or variations in gloss across tones, then I can be pretty certain it's not a "gicleee" or some other fancy name for an inkjet print. And if there's glare on the print where it hangs, then there's either a serious lighting problem or the print is hung in a bad location (where a source of glare can't be controlled).
So, I'll take a glossy RC print. Extra bonus -- RC prints will stay flat without dry mounting, which again is likely to save me money in getting a fine print onto the wall.
But my opinions don't matter much if you're trying to make a living selling prints -- I haven't got enough money to throw around to affect your income one way or the other.
