Guy who sells used computer hardware claims that buying new computer hardware is a bad idea, and that you should buy used gear instead. News at 11.
Not what this guy is saying is wrong, but there are other unaddressed issues. They cover issues like "power savings", but not the much more important issue of buying an unknown piece of hardware from an unknown vendor, without a warranty. Aside from that, sometimes there are issues of physical constraints-- like I have limited space, limited ventilation, and one UPS to supply power. Do I want to buy 5 servers, or one powerful one?
Also, it's not true that hardware isn't advancing. In the past few years, USB has gotten much faster, virtualization support has improved, drives and drive interface has gotten faster, etc.
And sometimes, buying "new" is more about getting a known quantity with support, rather than wagering on a crap-shoot.