Got our R/T tickets for 2020

Using air miles on United, we buy 1 leg at a time to be able to get the best fare. We got the direct from Chicago about 3 weeks ago for 17.5k air miles ea and today the return was 17.5k ea. The return had been 40k for the longest time. By splitting the legs, able to get the best seats available. The only thing, United is charging $19.00 ea per leg for the better Economy Seats(we paid the price to keep from going past the wings). Now just waiting for the time to pass by.