Seriously any franchise qb worth it would be worth entire draft(s) or multiple (3-4) first rounders.
The problem is if a team has a franchise qb there is no way they give him up. Period.
as an example I would give up this entire draft and then the following next two years first round picks. So three total first rounders including an entire draft class for either Aaron Rodgers or Andrew luck. Even offering all that there would be a snowball's chance in hell the trade would be accepted