A variety of factors affect whether you'll have DOMS after a squatting exercise session, including the intensity of the exercise, the duration, whether you've warmed up your muscles before exercise, stretching and post-session recovery.
Many observers are of the opinion that a large precentage of software-related inventions are no longer patentable after the Supreme Court's explanation of the abstract idea exception. See BitLaw's discussion on whether software is still patentable after the Supreme Court's Alice Corp. decision and MPEP Section 2106.
Promo items are of course very valueable, for example a vintage Lugermorph is tradeable but the Unique ones are not. Of course the one of a kind top notch hat for Notch himself is probably it. But its a matter of community opinion and whats hot and whats not at the moment for some items.