So... we are getting a Detroit offer consisting in Knight + expiring contracts, in my opinion that's the definition of selling low.
Of course Rondo's contract is a bargain, but if you're trading Rondo right now, you're selling him low, because teams are factoring in the injury/rehab risk.
On the other hand, if you wait until next february-june, you may have the chance to extend Rondo or trade him after his trade value is restored.
People wanting to trade him and/or Green now are selling low, because their value in 6-9 months could be way higher. I can't understand that interest in selling them right now for the sake of tanking, but I guess we all are right in our minds.
As for right value of a healthy Rondo, you don't trade the best PG in the playoffs for a young prospect. You need to get multiple prospects and picks. If Detroit wants Rondo, they should add Drummond, Knight AND a future (2016) pick. Danny is adquiring assets and working roster flexibility for a big move next summer, and I hope he can bring a couple All Stars to our team to play with Rondo and Green.