Hi, beautiful Picker that's a great bike. Bluemoon has some great stuff I stop in there quite often. Love the museum and the used bikes are always something to look at.
What I will tell you as far as value goes in my opinion and experience in Banana Seat bikes, Schwinn's hold a value where most others won't I collect Muscle/Banana seat bikes and whenever it's time to purge a bit the Stingrays move quick and the others sit and have to be sold cheap. Normally a bike like your Red one very nice looking and complete, but an off brand would go for $100 to $125 if you can find the right person. I have 2 off brand Banana Seat bikes that I have been trying to sell on the market since early Feb and got 1 email and a lowball offer for $50 thats less than I paid for the bike, but I have sold 7 Stingrays in the last month and they started to generate interest the day I posted them. Also Bikes with shifters on the bar are generally great, but usually carry a big price tag.
The Black bike I would say $50 to $75 most likely as its a girls bike and older, it would make a good college campus bike for some girl.
The only other comments I would make is stay away from off brand girl bikes unless you need parts as most have no return investment in them unless you score them dirt cheap then they are slow to resell. Schwinn FairLady's are pretty safe and still sell ok, and Schwinn Slik Chik's are always desired.
Your purple Sears bike is also sharp and a great color, looks to be very much there. Nice find!
Keep me in mind if you decide to sell the Red one sounds like you may be local to me, figure out a price and PM me I may be interested.