Put on Craigslist, I just sold mine that was older than yours for my asking price. Company sent a driver to pick up the unit and immediately Zelle'd the money.
I've never tried adjusting the price but yes it can in nickel increments from 5 to 25 cents. The shelves are also adjustable but I never changed them as they were set to 10oz bottles which is what I always bought.
Thanks for the questions. I only used the classic 10oz glass bottles so not sure about plastic bottles or aluminum cans. The shelves are adjustable so I'm fairly confident the answer is out on the web somewhere. I'll try to investigate a bit this weekend.