When I first started playing bass 15+ years ago I noticed that Fender sunburst finishes were priced a little higher than solid colors.
What's interesting is that Fender only offered sunburst as the standard finish from the late 1950's through the 1960's.
If you wanted any other color it is was a 5% up-charge, then known as a custom color job.
They offered several custom colors, all of them based on American automobile paint options of the era. I've listed my favorite 12 custom colors from that time period.