[2019] Will OPs get cheaper THIS season

From the Shifting Tides patch notes:

Seven more Operators are seeing price reductions this season. Hibana and Echo’s prices will now be 10,000 Renown or 240 R6 Credits. Dokkaebi, Vigil and Zofia’s will come down to 15,000 Renown or 360 R6 Credits, while Nomad and Kaid’s prices will decrease to 20,000 Renown or 480 R6 Credits.

I do not have an ETA when the Shifting Tides ops will drop in price, but it seems they eventually will follow the trend the other ops have been.