I have been using "Add a Motor" drapery motor for about 2 years. It normally works fine and I am generally okay with it, but it recently broke and I had to replace it. After lots of shopping around online, I settled on the same company's newer model designed for coop doors for $80. Price wise, it is the cheapest motor on the market, and it is easy to come by. However, I would have liked to been able to easily buy the the "Chuxaway," from the UK.
http://www.chuxaway.com/page1.aspx
A lot of folks don't have coop openers and would like them, but due to the lack of electricity out to their coops, just don't.
I was especially interested in Chuxaway because it uses AAA batteries and doesn't need to be located adjacent to an electrical outlet. This one has an integral timer and manual override. There are lots of times, I would have liked that feature to temporarily confine one of more hens to the coop. The "Add a Motor" brand doesn't have any special features and is only very basic. To get the Chuxaway, via
ebay bidding, it would have been at least $120+another $25 for shipping and a long wait to get across the pond. If a U.S. supplier carried the Chuxaway, even at a bit more than the "Add a Motor" at $80, I probably would have bought it in a heartbeat.
Glad to here you will be carry some kind of motor for your customers' coops. I look forward to seeing on what you settle on. Thanks.