If you're just looking for something to check your attys before you fire them, then any old multimeter will work fine. You can use them to check your batteries and everything, that's why they have the dial on them, for different settings.
There are a few e-cig shops that sell acrylic display stands for your attys that would work well for building on, and they're only a few bucks apiece. If you got a couple of them, you wouldn't have to have your old attys laying around anywhere, they could be stood up for showing off. Mine are all laying in a repurposed ashtray. This ashtray was on my desk for 15 years...can't bear to part with it.
The multimeter that I use, I got from the local hardware store for 13 dollars. Works just fine.