That is a great pickup. I'm a fan of Archie art and have spent some time trying to identify the various Archie artists. Here is my best guess at the artists from your book.
I agree with Mickey7 that Sun Fun is by Al Hartley
My best guess is that Serve Verve, both Dipsy Doodle pages, Snack Attack, Real Cool Kid, and Chap Trap are all Stan Goldberg. I think that Still Life is also Goldberg. I do see hints of Dan DeCarlo in the female character but not enough to make me think it's him.
You are right about Spray Can for Teens being by Samm Schwartz. It's definitely his work. He also drew Sun Fun and Vacation Elation.
I'm not sure about Hitch Switch or Jive Dive. It could be Goldberg.
I'm also not sure about Borrow Sorry and Sleep Deep.
I'll update a few of these on GDC.
As for prices, I think it's a very interesting topic and not an easy one to summarize. Art prices tend to come down to:
Vintage (pages from the 1940s are rare and tend to go for prices in the 4 figures and up). Pages from 50s and 60s will usually go for more than art from the 1970s etc.
Artist Art from the more well-known artists including DeCarlo, Harry Lucey, Bob Montana, and Samm Schwartz is the most abundant and can fetch decent prices.
Characters As MAR1979 said, art with Betty and Veronica will go for more than art without them and if they are in bikinis, then it will go for even more.
Format covers, pinups, and splashes will typically go for more than interior pages. Archie art is unique in that most stories are 5-6 pages in length and these stories are often for sale as a whole.
Heritage recently had an all Archie auction and some of the prices were pretty decent. The cover to Madhouse 1 by Lucey went for $24,000 and more recently, two Bob Montana covers from the 1950s sold for $26,400 and $20,400 respectively. So some of the higher-end covers. Then there's the 5-page story with the first appearance of Sabrina that went for $114,000. That's a bit of a unique case though, of course.
Anyway, great pickup. I always enjoy chatting about Archie artists and art.