The Imperial Palace cage put their $4 chips out for sale at the cage for one day only. I was there. Arizona Charlie’s sold their drop chip one only at one of their chip shows. Mandalay Bay and Luxor were selling theirs until they started running short. One way or another, Bally’s, Gold Coast, and MGM drop chips made their way onto the collector market. Tropicana has been one of the hardest ones, but a few got out, evidently.