We used to supply into Melbourne resellers as well as to private keepers now we dont!
The thing with the rodent market is there is that many out there with a handfull of rats/mice that dont have a clue as to their production costs
running out and selling to these markets undercutting price all the time.
Untill the first hot day and their stock dies or the market wants more than they can produce/supply. Then they collapse leaving those that are consistant in supply to have to pick up the void again.
Well now we refuse to supply into these markets and have scaled back production for our own uses (and a few close friends)
To the OP, rodents should not smell offensive when thawed, should not be covered in excrement, bedding or lice.