I'll throw you a bone since I like entrepreneurs, and I was hasslin you a bit in the other threads.
Build a stock flat rail, and flat box. Price what that would cost and take pictures of your work. Calculate the price to build some other features and post drawings or sketchup models of some ideas of things you could build/ how much each would cost.
It's more inviting to the potential customer to see your work and have some idea of a price in mind to go from. They might not be sure if they want one, really like what you built and decide the price is way less than they expected. They might also hate your work or think your price is too much. Either way they're going to decide the same once they PM you.
I understand you're down to build anything they want, it's just easier to shop when you have an idea what you're buying. Some pictures would help to show that you can in fact build them, and help people imagine them in their backyard.
"If you don't do it this year you will be one year older when you do"