Its not even a question. Westbrook has way higher MARKET value.
The Celtics have tried to trade Rondo for years - but no takers.
This year's draft has plenty of PGs that they could pick up - ...Exum, Kyle Anderson, Zach LaVine, Christon, Smart, et al.
Celtics should trade Rondo, for a second rounder this year and make the rebuild complete. With that second round pick they could scoop up someone like Isiah Austin, Mitch McGary or Napier to name a few.
Rondo would not be missed except by the overly sentimental fans.