bob
It's better to have two hands than one glove.
And commodities are what you get when selling vinyl by the pound. Available from any sign shop. Therefore consumer has no choice to view your shop as the same as every other shop, and the lowest denominator (price) is what drives purchasing decision.
Service will sell for far higher price than any commodity, because the service can't be obtained at every shop.
You just keep telling yourself that. Maybe if you say it often enough and huff and puff sufficiently, it will, as if by magic, become true.
The inarguable fact is that, within reasonable bounds, each shop is pretty much the same as any other shop.
It has always struck me that the desire to be a singularity, to be special, reaches obsessive levels in this business. The notion that you and everyone else is unique, separate and apart, from that nest of philistines down the road is pervasive. The only other place I've ever encountered this at these levels is among horseshoers. They too all think they're unique and they and they alone are the only one competent to shape and nail on shoes. But don't stop, the rationalizations created to support this bit of self deception are always entertaining.
That being said, in the finest Aristotelian tradition you and everyone else and your work are indeed unique. Unfortunately that uniqueness exists at a level that's undetectable by the naked eye so to speak. It's at a level that makes little if any functional difference between your product and anyone else's.
If you want to be serviced, hire a hooker. If you're lucky she'll even toss in some gratuitous complements dealing with your carnal prowess and the gargantuan size of your member.