Amazon has the CoolerMaster MasterAir Pro 4 CPU Air Cooler listed below:
This is a great price for this Air CPU cooler. It sells for 35$ which is perfect to get free shipping from Amazon and then it has an additional 5$ rebate to bring the total down to $30.00.
The smaller version MasterAir Pro 3 has a similar deal and is $25.00AR.
Note: AMD AM4 users need to request a special mounting bracket from CoolerMaster at no cost. Seems to be out of stock right now:
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