Wait till you open up tthat fixed location of yours, you'll be swipping the plastic like there's no tomorrow :xyxthumbs
I think you guys in the USA pay more than we do up here in Canada. My merchant account is $10 a month, gets me 1.42% on Mastercard and 1.46% on Visa, $0.08 transaction fee. Based on your quote up there, then sure, 3.5% "and that's it" is totally the way to go, plus you're mobile with it (whether you need that or not). Just for me (having very recently done several hours of research and calling 10+ merchant account providers), both seem like high rates to me.