It's hard to assess mixed media on the web. The art loses texture and depth. That said, my first impression is that it's not very good.
The owner of the gallery seems only to have three artists in his stable, including himself. Not a great sign unless the artist is R.C. Gorman. Though, like R.C., he's based in a small town. Unlike R.C. there probably aren't hundreds of good artists around him.
His earlier work seems to be much better than his more recent pieces. I liked some of the more subtle pieces. His other artist seems doesn't seem to be very good at all. Boring landscapes.
Rosie's work is all over the place. I get the impression that her kids may have helped out, especially in the straight edge pieces. One or two of them could be good, (again, i can't tell because of it's on the web) but it seems that she's not a particularly imaginative artist.
I'd say that if I were trying to sell this, and it wasn't a celebrity's work, I'd ask for between three hundred and a thousand dollars for it. Since she's a celebrity, I'd up that by at least twenty five percent, and I wouldn't be surprised if some of her work is priced in the three to five thousand dollar range.
There are some good celebrity artists out there. Patti Smith has an exhibit in the Contempary Arts Museum in Houston right now that's very good. (
http://www.camh.org/cam_exhandprogra...ed.html#smith, though if you're going to the CAM, you've got to see the Splat! Boom! Pow! exhibit on comics in art. It's really good.) I went to an opening for Viggo Mortensen a little over a year ago, and I thought he was very good. (
http://www.robertmann.com/artists/mortensen/01.html) His photography was better, I thought, than his painting, but overall, I was impressed. His work (at the time, about three months after the first LOTR came out, I have no idea what it's going for now) was priced as I would have priced it if he weren't a celebrity.
I have a lot of friends who are artists, and I probably go to six or seven art openings a month. There's a lot of crap out there, but there's also a lot of good stuff. And the crap and the good stuff isn't necessarily the same for everyone.