Those prices are a bit out of line.. If they were NOS sprockets, maybe. but they are new units.
I get sprockets made and my actual cost for a 56t sprocket is around $45-$47 (this includes shipping to me)
I retail the 56t at around $60. I have known FrankieMtn for some time, and he is a good guy, but his prices are
way out there! His shipping charges are also out there!