I am make album artwork on a graphics site, and because of copyright issues, they don't have any images that they're allowed to sell. I really think a good font will make a difference. It is going to be sold, mass produced, etc. Are there any free fonts on dafont that can be commercially sold?

yo
depends on which font you plan to use.
all fonts have different licences, every type of font is pecified close to the download button.
in any case, you should contact the font author if you want to be sure not to be suited.

Most fonts are free for personal use, but require licensing for commercial use. Check the readme files of the fonts you're interested in.

Come on, most of the fonts cost hardly 30 bucks... it's not that much for a "sold and mass prorduced" band!