The best thing the Saints could do by Alvin Kamara is to trade him to a contender.

Why would any non-contender or 'dumpster fire team' deal for AK??
Outside of maybe KC, there are simply no clean fits out there for AK...unless an major injury befalls a starting RB in the next few weeks, it is going to be tough to find a suitor. Only other small possibilities to my eye are; MIN if Jones injury ends up being worse than thought, WAS if B Robinson can't get his knee right or perhaps IND if Taylor can't get past his chronic ankle injury.
I still think a 4th RD pick is absolutely the most compensation we can expect for him.
I wasn't clear in my post.

If the team wants to trade a player then the team should try to get the best possible deal for the team not ever the player.

The OP was that the team should trade AK to a conterder to do him right, IMO that is the wrong approach. If there's more than one interest team then the best deal for the team (and fans) should be the only consideration.

I don't think the team should trade any player if it's not good for the team.