I picked up a nice little cage at a yard sale today, for $1 (including a purple hamster igloo!)!! My intention was to donate it, but after using the cage calculator I'm not sure any rat rescues would be able to use it. The dimensions are in the subject, which equals out to fitting 1.3 rats. It's three stories (2 feet tall), with a purple metal pan and white powdercoated wire (with the smallest bar spacing). Is it possible a rescue could use this for babies or something?
My second choice is a hamster (or mouse, I guess!) rescue, so either way it all works out. Now to fight the temptation to FILL it!

I'm asking in general instead of a specific rescue because I'm not sure if I'll be down in the area of my local rescues any time soon.

So I wanted to see what my best bet was before asking specific rescues.