Depending on how you sell the comics, it takes a lot of time and effort. How were you thinking of doing this?
On your own, you'd have to scan, list, pack, ship, deal with buyers, etc. How much is your time worth? You first post doesn't mention your day job, time with family & friends, other hobbies, etc.
However, If you enjoy selling your books this way you might maximize your profit, as opposed to option #2 --
If you try to sell to a dealer, be aware you'll probably need to leave a lot of the "good stuff" in there to make buying the whole collection a more attractive option, rather than being cherry-picked.