12V, 10A power supply on sale

I just picked up one of these power supplies http://www.dipmicro.com/store/DCPS-12V10A-B for $12 plus shipping, am using it to test LED panels I made up that draw 3.8A each, firing two of them at a time in 100-500mS pulses every 5 seconds. Seems to be working well so far! Pretty compact unit, 160 x 98 x 42mm, 6.3 x 3.9 x 1.65in. Power cord from a defunct dehumidifier, and 18 AWG wire to the panels. Used two 5A units before this, I believe from same manufacturer (same form factor & markings anyway), that I used for 4.5A pulses, they also worked well.

I imagine they're produced in large numbers for 1U rack mount units. Hence the very low price for the specs.