If you can find the roto-pod hardware you can flip those gain pots around to the front (along with the XLR jacks of course).
I owned three of the original CR-1604's and they are actually pretty solid mixers in my opinion. That said, I did need to send one back in for servicing. The one I gave my brother also needed some repair, but that was when it was about 8-9 years old.
If it's working well and has no obvious problems it could be a good buy if the price is right.
Also, the newer Mackie stuff is made in China, not Japan.