Disclaimer: Barb is terrifying in this video, and may give you nightmares. Poor things probably think they have thousands of dollars worth of comics. From what I could glance from the shaky-cam, it's mostly mid 70's early 80's DC. Looks like Cole was a fan of Sgt. Rock.
Powerlevel Alert: I know grading comics. For what I could make out i'd offer $100 ballpark for the lot just to add it to my hoard, not to resale. Maybe there are some key issues that could bump it up, but condition counts. Doubt any comic shop would offer more than $50.