Automatic Coop Door Opener: Your Experiences Please!

[pjomega]

I use the pullet shut, and it is well worth it. Very easy to install, and I have had no problems with it. I use the photo sensor, so it opens and closes based on the light, not on a timer. I cant say enough good things about it, Im going away for a few days, and I dont have to worry about having someone go over every morning and night to lock them up and unlock them.

 

[KDK1]

I am currently designing an automatic door that opens in the morning and shuts at dusk. Would any body be willing to pay $100. for this device? I have built the first door, and it works great. I was told I should market my idea. Any thoughts?
My idea is completely different then the ones that are on the market right now.

Pictures and specs would be needed to make an informed decision.