T.,
You are talking about your car, your safety, your family's safety when in that car.
We buy tires from Discount and I buy the high end. My last tires were $1400 for a set ( I drive a high end luxury car so I expect my tires and everything else to cost more)
I willl not skimp on health or safety and I did not waste money on tires. I bought good tires that will last.
Go cheap = get cheap and you'll be buying again sooner than necessary therefore spending MORE $. You may get the same tire at a flea market but hop you get someone who is reliable to put them on, etc so that you are SAFE.
Discount tire has a good warranty program as well.