If there are any ferret owners in the South East Michigan area that are looking for a cage with solid shelves that is large enough to hold a couple of ferrets I'm looking to trade mine for a more rat friendly cage.
I have this model from Pet Smart that I bought on a whim.

It's very hard to clean and maintain for my five rats that are not litter box trained. It would be much better for a ferret owner with a lot of litter box trained ferrets.
I'm looking to trade it for something like the Martins 690 or a Ferret Nation.
Mine is well kept and pretty good condition. The tubes are chewed on but still quite functional.