Where can I get a pair of good Koss PortaPro's?

Been doing a whole lotta research for some cheap-but-fantastic headphones or earbuds. I figured I’m mostly listening at home and I’m having trouble attending to my parents’ requests for anything because of my noise-cancelling JVCs, so I’m actually preferring a good set that’s not focused on that. I discovered these Koss PortaPro headsets , and the reviews are so damn good for a $50 set that I’ve decided on them for sure, unless you guys might suggest something that’ll even blow that away.

However, I did go ahead and look at the 40-or-so bad reviews, and this is when I started to notice a trend… All the great reviews were in a period around or before 2007, which didn’t really matter until I realized that the bad reviews came in the period after 2007. Reading on, it seems like the design quality of the cables and the audio jack have been severely reduced, and these elements breaking are an issue.

I also read, both on Amazon reviews and elsewhere, that Best Buy at one point sold a special all-black edition, which was a twin, but according to Best Buy reviews, it didn’t have the issue I just mentioned, and the reviews were from 2009 and later. Joy of joys, Best Buy doesn’t even sell them anymore!

So what should I do? Should I even worry about it, since I’ll just be using these at home and taking more portable earbuds elsewhere, or try to find some older-and-still-for-sale or used set somewhere?