I guess I side with the charge the most the market will bear group. I want to be making $30+ per
sign rather than $30 per 10. If my market was saturated with garage based vinyl pickers I would either drop my prices or drop the product line.
The economics of signage are no different from selling beans, charge the most the market will bear. If the result is profit you are doing it right, if loss you are wrong. It's really very simple, if you are making $30 per 10 you are either doing it very fast, outsourcing to the guy next door or losing money.
...and if you are selling 10
signs retail for $70 you are a blight on other
sign shops in your area (fortunatly you won't last long).
(that last bit was to throw more gas on the fire).