You can view sales history at Discogs: Sales History — Clifford Jordan - The Complete Clifford Jordan Strata-East Sessions (Mosaic Records (2)) Box, Comp, Ltd, Num, 5,0 + CD, Album, RE + CD, Alb . And yes, that $125 Clifford Jordan set was partial (CDs only).
In general, with a few notable exceptions (e.g. Threadgill), the prices for Mosaic CD sets have collapsed (don't follow the LP market, might be a different story there). Last year I picked up (the great) Clayton set in pristine condition for less than €10 / CD shipped at Discogs (after a bit of negotiation) - and I see there are even better offers now: https://www.discogs.com/release/7114702-Buck-Clayton-The-Complete-CBS-Buck-Clayton-Jam-Sessions . I somehow sold a few of my neglected Mosaics (Woody Shaw Columbia, Armstrong live) at Discogs at OK (not exorbitant) prices a few years back - I see they sell quite a bit lower now.