Craigs List will bring you a lot of scams, but maybe a legitimate buyer.
Pinside has an active Classified Ads section.
Mr. Pinball has classified ads, but they are not as active as they used
As much as I don't like to admit it, Facebook has a pretty good
In most cases, people will not want the entire group and try to split
them. And you are more likely to get the most money selling them
If you were on the east coast, I would take a shot at them.
Don't under price them. Pinball prices went way up during the pandemic,
although they might be coming down a bit. It is difficult to get a good
feel for what they should bring, because price depends on condition.
Here is a good place to start: