Let me begin by saying that I have no reason to think this is going to happen, but it's not illogical.
1. Sonics buy two first round picks for $8 million
2. Sonics pay 80% of it.
3. Sonics arrange a buyout whereby they cut their cost by $1.5 million
Let's assume this is arranged in advance. Sonics are out of it, buy KT out and he signs with the Suns. The Suns vet minimum turns out to be the amount of the buyout, so KT doesn't lose anything and he's still available for the playoffs.
It seems pretty far fetched, but weirder things have happened.