Looking at Philly's roster, I'd say they'd be interested in picks and young guards.
If Rozier looks good after his rookie season or his sophomore year, I could see them asking for something like:
2018 Brooklyn pick+
Rozier+
Hunter.
I love those two rookies and it would be hard to pull the trigger- but I think that's what they ask for because they know that if Smart becomes a legitimate top 40-50 NBA player in the next year or two, Rozier probably has less of a future with us.
Good thing for us is that Ultimately we could sign Noel as a free agent in about 5 years time, just as Noel, Smart, Hunter, Rozier all enter their primes. Noel wants to be a Celtic one day and that's a very important factor in Danny's future planning.