Yeah, I'm sure they are more pricey. Plus they must have less ability to conform to obstacles than a tire with the same rolling radius on a smaller wheel. Probably good for a bragging contest at the mall, though.
I already have my "good" 15in rims. Was intending to get a second set of mounted tires anyway. With almost all half ton p/u's gone to 16s for 15 plus yrs, 16in tires are competive price w/ 15s. 16s offer some ht/ width combos not common w/ 15s. I make a point to avoid all malls.
I have a good excuse to look for 16" 5 on 5.5 wheels.
This weekend I bought a set of nice 16" wheels for my tow rig and they had decent 37" radials on them. If I could find a cheap set of wheels, I'd run them as street tires vice the unbalanced swampers on beadlocks.
It's not what you have. It's what you do with what you have