I bought a used Dell Axim x30 for $85 at Amazon and installed Mobi Pocket on it. LOVE it! It has a color screen and I can enlarge the text larger than I can on my eBookwise. Yes, the screen is smaller so there are more page turns. But with the touch screen, page turns are easy. I can also program any buttons I want to do page forward or back. So much easier to tote around than my EBW.
Edited to add: You can often find them cheaper on eBay, but I had an Amazon gift certificate from CC points so it was essentially free for me