It'll be hard (impossible) to find one that is both inexpensive and with a keyboard. However, with being able to enter the data from a PC and then syncing it to the PDA, is a keyboard really necessary if most/all of the action on the PDA could be looking up information? If you can give up the keyboard, great basic Palm PDA's are the Zire 31 ($150) and Tungsten E ($200) with some holiday deals available now.