If the Celtics could trade up and get Tyler Zeller that would be worth it. He is big, rebounds, plays good D and runs the floor. HE is NOT a real low post threat with only one good move, being the half hook he can go both ways with, but he can be taught.
Zeller would be worth the move. If not just take Fab Melo, the guy needs work but he has serious potential and can be drafted 20-32 easy.
As for the 2 Purdue players, they are Purdue players from the Big 10. Overrated, undersized, lacking key skills. They were both a waste to draft and are worth nothing.
As a North Carolina Alum and fan I have never, ever worried one bit about Purdue or anyone who ever played from them. If I see Purdue on the schedule the question is not if UNC will win its will they cover the 20pt spread. Not much confidence in anyone from Purdue, but to be fair I usually feel that way about all Big Ten teams.
This is all anecdotal, take it for what its worth.
If you can get a Henson or Zeller or I agree with the above poster Sullinger, you trade for them.