Having your snake up for sale for 1 month is nothing. Be patient.
I had a pastel female that was up for sale for 8 months. That was my longest sale. Most of my other animals were sold within weeks. And I know some of the snakes that I have purchased from other breeders were not sold right away either.
As for racks, I haven't had any issues with them regarding the law.
When I move to a larger house, I might be inclined to move some of my more aggressive eaters into a display enclosure. But there's no way some of my ball pythons would eat in anything larger than the tubs they're in now. Heck, some of them are picky as is. So moving them to a 'humane' enclosure is pointless if they're only gong to eat/thrive in an enclosure with the same floor space as the tub.
I think I'll always keep ball pythons in racks because they thrive in there. My other non-ball snakes are in larger displays because they're not as sensitive or picky in regards to space/food. And they're species that will actually utilize the space unlike my ball pythons. My BPs are in their hides so much, they don't even utilize the extra tub space.