I'd prefer to be at $50 per tire, though at the size your looking at it is a good price when seeing the Costco example. I would want to know an estimated cost for rims, mount and balance too, as a minimum (guess) estimate you'll likely be about 4 x $60 = $240, $540 total, your pushing over $500 and just wonder if you could have gotten a set delivered for a cost near this. I don't know, seems reasonable for the size tires I'd buy, your in a larger realm.
But my recent experience is just about that, $30 a used rim, $30 a used tire, and just about $30 mount and balance. Might be a little high on the mount and balance but my buddy works there...and next time I'll be thinking about new tires instead, there's less running around.
I seen this comment
posted recently, never used them but it could offer some comparisons;
Tire Rack is your friend. Use it.
Just checked Tire Rack for my 2004 Sienna, 215/65/16, steel rims at $90 each, tires at $109 each; just under $800 total mount and balance included. There's a $80 discount for pick-up, so that leaves the total at $704.27, pick up being just over a hour drive one way.