As far as prices... Pro comp, super swamper, and yokohama make some tires in that size range that are fairly cheap. It's not really going to matter where you buy them, most places will match someone else's price. Sometimes you can find places online like natltire.com or desertrat.com that sell tires a little cheaper, but then you have to pay a TON for shipping. 4wp isn't usually too bad.
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