Looks late 60's Huffy made, but has a Murray chain wheel. Check the serial number, should have a number followed by a letter if it's a Huffy, like 8Hxxxxx for a 68 model.
I like the color scheme, as for year 1960s for sure. serial number would help with a exact year. As for value girls bikes are a hard sell not as desirable, I just sold one that looks just like this locally for $150 but it was original paint, and I completely rebuilt the bike so it worked like new.