This sign has been posted down the street from me in Novato, California for well over a year. Every time I walk past it I want to bring some maroon paint and fix it. As an aside, I also see a trend in the use of initial capitals in ad copy such as this one. Save initial caps for titles, please!
…although one could at least make the argument that the signmaker was using the apostrophe to mark the omission of “minium”.