Try grocery stores thy mainly have them cuz they have big traffic of ppl buying little shit. Lot of places are actually pulling these machines out though because of a "self checkout crime wave" not just dumps but mexicans come in and tell machine they got donuts, when they actually got expensive shit in the box that is the same weight to fool scale. All kinds of fraud happening with these machines.
At store I worked before, they would close self checkout after the manager overseeing it went home. Have you got hit with "error,please wait for attendant" ? It is not error ok, careful, sometimes they use to check you out and they say its just machine.