Here are some deals I'd be willing to do for Rondo. Pretty much all of them favor the Celtics, but I think given the fact that we don't have to trade Rondo and even if we do we are in no rush to do it, we should have the leverage to get the other team to overpay a bit.
If we aren't getting back at least equal value then we shouldn't trade him and I'd expect Danny to make sure we are only taking calls on deals that he thinks we could get the better of. These probably aren't all realistic, but they'd be my starting point:
Detroit:
Rondo, Wallace for Drummond, Stuckey, Charlie V.
Rondo for Monroe, Knight, Stuckey, Charlie V.
SAC:
Rondo, Lee for Cousins, Salmons, Thomas, Fridette, McCallum
Rondo, Bass for Cousins, Salmons, Patterson, Thomas
Rondo, Lee for Cousins, Salmons, McLemore
ATL:
Rondo for Horford and Schroeder
DAL:
Rondo, Lee, Bass for Marion, Carter, Larkin, Ledo, 2 future firsts
Rondo, Wallace, Lee, Bass for Marion, Carter, Larkin, Ledo, Crowder
ORL:
Rondo for Orlando 2014 first, Vucevic, Harkless, Nelson
Rondo for Orlando 2014 first, Harkless, Nicholson, Turkoglu
Rondo, Wallace for Orlando 2014 first, Nelson, Turkoglu, Harkless
Rondo, Wallace for Orlando 2014 first, Denver 2014 first, Nelson, Turkoglu
Rondo for Orlando 2014 first, Denver 2014, Sixers 2016 first/Orlando 2016 first
CHA:
Rondo, Wallace for Gordon, Sessions, 2015 unprotected pick
Rondo Wallace for Gordon, Sessions, Detroit and Portland 2014 picks (protection probably carries them over to 2015/2016)
Rondo, Wallace for Gordon, Sessions, Kidd-Gilchrist, Detroit/Portland pick
Rondo, Bass, Lee for Gordon Sessions, 2015 unprotected pick, Detroit/Portland 2014 pick
UTAH:
Rondo for Hayward, Burke, Gobert, 2015 first unprotected
Rondo, Wallace for Jefferson, Burke, 2015 first
Rondo for Kanter/Favors, Burke
Most of these are unrealistic so you're saying you wouldn't trade him unless you were blown away with an offer...
Basically, yeah. I prefaced them by saying they are favored to the Celtics and probably unrealistic, but that would be the return I'd start asking for.
The OP said the trade is for Rondo back at full health and averaging the same numbers he has all his career. For me that makes him a top 5/7 PG in the league (Paul, Parker, Westbrook, Rose, Curry and Irving are the ones in the same class, I think Williams, Holiday, Conley etc. are a notch below).
Now pretty much everybody in that top 5/7 is absolutely unavailable for even being considered in a trade, except Rondo. You have to pay a premium just for the opportunity to get a guy in that small category.
Then if you look at the recent deals for Paul, Williams, Holiday and throw in Harden too, as a starting point:
Paul went for Eric Gordon, Kaman, Aminu and a first rounder.
Deron Williams netted the Jazz Derrick Favors, Devin Harris (who had high value at the time) and 2 future firsts.
Holiday got traded last week for the 6th overall pick (Noel, who could have been the number 1 overall), a 2014 pick and a 2nd rounder.
Harden went for Kevin Martin, Jeremy Lamb, 2 future firsts and a 2nd rounder.
I think Rondo (at full strength/healthy) is worth the more than Holiday or Williams and close to/about the same for Paul and Harden. Looking at it that way then I don't think those deals are that far off. Again they're admittedly favored to the Celtics in most every situation, but thats what Danny starts off asking for and then can relent (a bit).
Your'e not going to get that type of deal now, but under the assumption that he is at full strength and playing as well as before he should bring back at least a similar amount as the deals for the guys I mentioned.