$80? shipping 4 new 205/50/15's from tirerack is ~$35 to ship via Fed Ex ground.

(I took the mileage from chicago to lancaster and then found a place that far away from South bend, calculated shipping on four new tires)

I've shipped four tires to Atlanta from chicago (also using fedex ground) using only tape to bound two tires together (so two shipments) and the cost was $35-ish. Add in cost of tape... say $40.

I'd pay $40, give or take a few.