That is really strange. I have picked up mint $1's in the weeks preceding the close (like right now) from several other casinos over the years. I am not a fan of the house molds for sets as it makes sets difficult to match so I wasn't going to make a special trip for these.
Maybe the idea of purchasing the remaining $1's of a closing casino has caught on. I am guessing that there will soon be many, many Trop $1's on e-bay for about $5 ea + $3 for shipping....lol