Standard, modern, rare earth, black (developed) x-ray film contains an average of 0.1 troy oz of silver per pound. At today's market, that's $1.37/pound. Undeveloped (green) rare earth film runs about 0.2 tr.oz./pound. If the film is DryView, it will run between 0.04 and 0.1 tr.oz/pound, whether developed or undeveloped. DryView uses heat for development and, therefore, no silver is washes off. Developed DryView looks the same as black rare earth. Undeveloped Dryview looks like a sheet of clear (usually blue) plastic. DryView can be distinguished by holding a lighter flame under a clear (non-black) area of the film for a second or two. If the spot turns black, it is DryView.
In most areas, there are small film buyers. They accumulate film and sell to larger companies. These larger companies accumulate 40,000# truckloads and ship to one of several large film refiners spread across the country. If you are lucky enough to be near a film refiner, you can sell for about 65%, or more, of the silver content. If not, you can sell to an accumulator and receive about 20% to 50% of the value, depending on the buyer's position in the daisy chain. Some buyers and refiners won't accept DryView, since it is more difficult to process.