People do buy things like this and do make a bit of pocket money from it. The only thing I can advise it to look on the net for a creative type website that lets you sale via them, they exist and are like eBay and lets face it eBay is an ideal place for this.
What you need to do is get lots of example done and photographed nicely so you have a portfolio of work people can see and choose from. So there is a bit of investment needed up front with time and money but once you get advertising the return should be worth it.
As for prices have a look in the market place to see if others are doing something similar and what they sale for. Also factor in the cost of products and the cost of your time (threlativetive) then add 20% for profit and see if your competitive.
Best of luck and lets see some of your works.
