While that is a nifty fan design and a price to boot, this is the original
Fridge Fan that I purchased from Ebay in 2008. They were the first and are produced by a fellow RVer. I'm not sure about the other imitators of the fridge fan on Ebay, but our unit has worked flawlessly for 6 years. Last year one of our kids force a can of soda against one of the fans by accident and broke a blade off of a single fan, a quick e-mail and a fan was shipped that same day for free.
Great service and with over 5000 fans sold they enjoy a 100% rating. We started with a small battery powered blue fridge fan from Camping World and it was somewhat effective, there is absolutely no comparison as this fan moves some serious air. Fridge temp stays stable no matter how often the door is opened, we would never be without one.
Just like anything else on Ebay, there is some good quality product available, and then there is some garbage, looks the same but we know that can be deceiving. This is especially true when it comes to LED lighting, which is why when we did our LED conversion to our rig we came to this savvy bunch of RVers and purchased from an Ebayer highly recommended by this forum. To date all LEDs have been functioning without a single failure for 3 years.