Mommy, I want one!!!

So I've wanted a button maker for a rather long time, because I have all sorts of ideas in my head for cute, fun buttons to make and sell. Plus, I'm a button whore (you should see my purse/backpack/etc). But button makers are SO expensive... (for anyone who's never looking into getting a button maker, new ones start at $200 plus...) I want to make sure I get the right one the first time, so it's worth the investment. I've been poking around the Etsy forums, and it seems that nearly everyone prefers Tecre brand over the Badge-a-Minit ones, so it seems like that is the one I will be going with. I'm also pretty sure I want to go with the 1 1/4" sized buttons, although I'm still toying around with the 1" ones. I think those might almost be too small though -- I know for my "personal " use, I tend to prefer the slightly larger ones. However, I also need to know what will sell better... If I'm shelling out over $200 for one of these machines, I need to at least make that money back on it. I'm not sure how well buttons will sell on Etsy, I think it's kind of a hit or miss, but I am pretty sure they will go pretty well at some of the craft shows I will be going to during the summer. I live in a college area, and lots of college and high school aged people like spending a dollar or two on their own little 'pieces of flair.'
Ugh... there's just so much to think about. I'm going to keep poking around on Ebay and hoping that I can find a used one, because that will save me at least $50. It would be awesome if I knew someone personally that didn't want theirs anymore and would be willing to sell it to me for fairly cheap, but so far it looks like I don't know anyone that makes buttons, or used to make buttons and doesn't want to anymore...