$200 seems fair, depends on your time. I would have this out the door in about 20 minutes with a 10-20 minute install so even with design time it's maybe an hour to hour and a half job (depending on customer wanting to b.s.) This is a job I would tell the customer about $150 and make talk the dude into making those simple arrow house things in the corners red to make the design a little more cohesive. But then again, if I'm on a nice day i might do it for $110-150. (but that is also because my overhead is low, my time is minimal and the job is super easy plus I don't have errors and if I do, that cost is covered with the 20 some odd other jobs I do without error)
Just because I seem to always have to type this out ... are you covering your costs? (just in case you don't know how to calculate your actual cost its ... [materials + shop overhead *like utilities, taxes and equipement* + man hour cost] x margin [for errors or add. time or whatever]) if you cover your costs, whatever that comes out the rest is profit and you need to find out what your market dictates for cost vs your expected profits. Asking what you should charge is going to get you no where if your market demands $200 to stay fair (to yourself) and competitive but still cover your cost and everyone says $100 or vice versa where your market $100 is reasonable for the tiny job but people who have different costs and different markets are saying $200. Know your local market, charge accordingly to where you want your profits to be with your area ... you can find just about anything cheaper ... customer service and quality of production are 10 times more valuable than price an customers who know you offer it will pay more than dealing with the cheapest vinyl jockey out there because 'eh, good enough'.
