I bought this power supply back in September 2016 and it has been working fine since then. Current retail price is about $45. Specs:

Corsair CX500 (https://www.corsair.com/us/en/Categories/Products/Power-Supply-Units/Builder-Series%E2%84%A2-CX500/p/CMPSU-500CX)
500 W, 80+ Bronze efficiency rating
Non-modular

Comes with original box, removable dust filter, power cord, and 3 screws.