I am about ready to sell the various calculators from my father's collection. The one I would like to hold onto is an HP65 that has a bad motor and rubber wheel. Is there anyone who is experienced with fixing HP65 motors that would trade the fix for any of the following: an HP 65 with corroded battery terminals, various HP 65 accessories, an HP 45, an HP25 or an HP25c? If you are interested, send me an email: michael dot altmann at gmail dot com and let me know your repair experience and what you think is a fair exchange. You can see my collection on this Facebook photo album https://www.facebook.com/media/set/?set=a.10200587090655666.1073741826.1111219579