Where to get Cheap "Good" Claw Crane machines

[locussst]

I am relatively new to crane machines but I have a few.  They are mix of new (Smart) cranes, which I really like and older cranes that I picked up off Craigslist.

Question is: where can I get good used cranes that won't look terrible and won't need repairs all of the time.  The smart cranes I have feel like they'll probably last forever, the used ones I have, not so much as the quality was probably lower to begin with.

Where and how do you guys source these crane machines?  Thanks.