I found this PC while looking for a low power PC to use as a mythtv backend.
While there are more powerful PCs for the money and cheaper too, I don't think you'll find one with as good a ratio of pci slots to watts.
This is important to me, and probably to others, as I don't want a 200w device running 24/7. At 40W it will cost around £3/month to run 24/7 compared to £20 for a 250w device.
With dual DVB-T and dual DVB-S2 tuners you could have up to 8 tuners, which is more than enough for most people.
To get the 287.51 price you need to remove windows and antivirus.