That would depend upon the artwork. A smart bet would be that Le Croco decals would not bring in a single cent of additional business.
$100 seems to me as a screaming deal for recreating vector art. But you don't need Velocals to make vector art. Craigslist is silly with underpaid graphic designers who forked over $1,600 to have Creative Suite. They will be happy for the job. Then go to any of the dozens of sign makers in your area to have the decals printed and cut.
It ain't rocket science.