Questions I am asked frequently are "Will a cat use a litter box another cat has used
and is it sanitary?"
The answer to both questions is "Definitely". While I won't show a used litter box actually in use:), I do foster cats and have never purchased a new one. I do spend
quite a bit of time soaking litter boxes in clorox and then in vinegar. I have never had a cat balk at using a used one. I also make sure not to use or sell one that is not in good shape in the first place.
Covered litter boxes usually cost 10.00-12.00 at Pet Stuff Resale.