If he opts out the Dodgers would extend him a QO offer which is the average salary of the top X number of players (don't know the number off the top of my head). Any team who signs a QO player forfeits their first unprotected pick.
What Dinger is saying is if this was the market for him without a draft pick attached, he's not likely to be anymore enticing to teams next year a year older with a draft pick attached to him, so he likely won't opt out.