what you need to do is go to any tyre shop, ask for q quote , and then go to tony's tyre, because tony will beat it by 10 dollars per tyre.
last time i got quote from firestone, (buy 3 get one free) then go to tony and tony beat that price by 30 dollars (3x 10)
if you want cheap tyres go to road rubber, they sell good condition 2nd hand tyres