So, a lot of people seem to find 210 compressors for like $30...I can't. I browse for them occasionally, but I've never hunted too much. I did finally find a 209 today at a bone yard for $60. Rotating it pushed air out, so at least it's not trash. Should I nab that instead of waiting for a 210? its 8.7 cu in instead of 10.3 like the 210. It obviously doesn't turn out the same volume, but it still seems pretty good, and better than any electric pump. What do you think? Are 210s more rare or harder to find?