The only way I would entertained trading Cam is if he is done and we can get enough to draft his replacement. Anything less is a kiss of death and the poor next guy wouldn't have a fair shake no matter what.
10 teams? I don't see it.
MAYBE Tampa, Washington, Chicago, Denver, Tennessee, maybe. And most of those would probably rather just draft a new QB since they aren't in contending windows, save Chicago.
If you can get a 1st rounder, you do it and don't think twice. Use the free cap space to load up for the years remaining on KA's rookie deal like Philadelphia, Seattle, and SF did this decade.