We only sell new ones if you need one. If you are going to look for a used one check it out carefully and make sure the main housing is not worn out where the air valve slides up and down. 425's with some age can be worn excessively in that area and cause hard starting and a rough idle that cannot be adjusted out, There is no "rebuilding" 425 mixers with worn housings.
Buddy Gamel
Precision Sales & Service, Inc.
451 64th Place South
Birmingham, Ala. 35212