Elektron Musical Instruments

I'm going to have a Machinedrum soon to go along with my Monomachine.  
Since I was mostly software before (outside of pre-amps, mics etc) and 
only had the Monomachine, I've never had the use for a mixer.  Now I 
do...so I can hear the Machinedrum and Monomachine together.  Anyone 
know of a decent mixer for under $100.00.  They exist, but I'm not sure 
which ones are going to color my sound for the worse.  What should I 
look at and what should I avoid?