it still amazes me that there are so many people in my area that do not take credit cards... Since I started out, I have accepted them. I find that people take you more serious as a business when you offer cash check or credit.
I do about 35% sales with credit and you would be surprised how many customers say "oh you take credit? cool! I guess I will go ahead and do the headlights and the paint sealant too."
the sale almost always goes up when they use credit and that's with me not really trying.. I have a mobile Nurit machine that is cellular and prints out reciepts right there.. works great!
I don't wanna put anyone else down but people do tend to take you more serious when you offer credit/debit as an option.. they just do. It's 2011 and it's pretty easy to get setup.