Most of those I recognize as "Jam Pac" era castings, late 1960s into the early 1980s. The blue pickup, pea green sedan (wagon? front right) and red twin engine dragster I don't recognize directly (most I played with were late 60s- early 70s before I outgrew them). Dragster might be Midgetoy, not sure, build is similar to Midgetoys I've seen. Pickup and sedan/wagon probably late Tootsies, sometime late 1970s.
Value is catch as catch can. Not particularly valuable, not many collectors bother. These sold in multipacks for less than a dollar back in the day. I would mark them at $1 each and take whatever someone offered.