Re: Selling old masters copies
There must be a market for them because there are several places, mostly in the Orient (China) where shops full of painters sit and daily turn out dozens of the same paintings. They are sold on websites. These same "art sweatshops" offer low prices to do a painting for you from your photo, or to do an old master painting in any size you'd like. Apparently, they sell a bunch of them or they wouldn't go through the expense of keeping a web site up and running.
Sorry, I can't put my fingers on the site addresses for you. I've visited them and I must say that in my opinion their work ranges from crap to rather good. But I suppose that is mostly a function of the quality of the artist doing the piece, and which one they select to send out.
As for your work, if you have a web site, you might float them out there and see who salutes them. As you mentioned, if nothing else doing them is a great learning experience.
I'm sure that if you do a little web surfing, you can find at least one of these Chinese art sweatshops and see what they offer for sale.