OK, this just bugs me because it is so obvious.
$ is a symbol meaning “dollar(s).”
“Dollars” is a word meaning “dollars.”
Use just one, not both, or we get redundancy.
I just ran into the problem in Art News online:
HERE’S HOW PETER LIK PRICED THAT $6.5 M. PHOTOGRAPH
BY Dan Duray POSTED 02/23/15
“…Peter ultimately came back and said that the $6.5, $2.4, and $1.1. million dollars was how he wanted to set up the pricing structure.”
Do they have a copy editor?