About a year and a half ago, I bought about 10 pairs . . .
They sounded fine at first, and seemed like a good value purchase. However, a year later, only one (out of the original 10) is still working, and even that one is a little iffy. That's 9 pairs that have basically gone bad in that time span, including one that pretty much ruined a session for me.
Do yourself a favor and spend just a little more on something that might have a remote chance of actually lasting a little while.