The Boys and Girls Club Bike Exchange in Ewing, NJ gets these all the time. Typically Trek MT-220 or Specialized bikes with 24" wheels, some with front suspension, some with front derailleurs. They sell for under $100. I'm there Tuesday and Thursday nights.
The Plainfield location is tiny. Our Ewing location has 80ish bikes on display and another 100 in process. It really is a fun place to hang out and fix bikes.did they get a new store front? I used to work the one in Plainfield, though a much smaller operation.
been meaning to get back there to help for the holidays. Doing good work Jim!