Some tips for buying a used garage workbench are to make sure it is the proper height and to make sure the style and size are compatible with the work done in the garage. Another tip is to make sure any tools used work with the surface.
Another tip is to make sure a workbench is even needed at all. Often, a clamping table or plywood on sawhorses can be enough. When evaluating a used workbench, pay more attention to the wood's stiffness rather than its species. There are many inexpensive woods that have the same characteristics as more expensive species and do the job just as well. Finally, the workbench should be friendly to clamps and should not have too many drawers, doors or aprons that interfere.