Hey everyone, I have an extra Epson 3800 that I was going to convert to a piezographic carbon ink set printer. I never ended up doing so. So, I have about a 15 year old printer, never used, with a set of full, unopened ink cartridges . So, couple questions…first, if the ink is simply shaken a bit, is it still viable. Second, any seen what an unused one goes for now? Still a superb printer. Thoughts?