How many amp battery should I have and how much is average cost?

What is your question?

I bought a battery 2 yrs ago and paid $110 for it. Two yrs later, and my car has been dead several times and needing jumped for the last six months. The garage who sold me the battery took it in, checked everything and said nothing is wrong except I don't drive it enough (spare car). With my other batteries, this was never a problem. So now he's telling me it's the starter. I just want to make sure he's not going to replace the starter and it'll let me sit again because of a bad battery. Note: the battery has a 75-month warranty, but I'm not sure on how many amps. Would he have to replace it if it was bad? That is what makes me leery of this whole problem. I guess next I'll have the battery tested to make sure it is not bad (probably should have done that first before I called the garage).