Cost of reg set/cost of yearly maintenance = real cost

REG 1 (online)
350 for stages
60 hoses
60 labor
60 parts kit
20 shipping

410/140=2.9

REG 2 (from a lds)
625 for stages and hoses
50 taxes
60 labor with discount, first year free
0 parts
0 shipping

675/60=11.25

REG 2 (from grey market)
525 for stages and hoses
50 labor
60 parts
20 shipping

525/130=4.0

or

525 for stages and hoses
75 for labor
60 parts
0 shipping

525/135=3.9