Today, I purchased an NES to replace the one I gave away long ago. I overpaid for it at a used game store because I didn't want to put effort into Craigslist.
That is not what this post is about.
On the way back from buying the NES, I stopped at a Radio Shack. I have two rather large speakers in my living room, I wanted the monaural output from the NES to go into both of them, and I didn't want to wait on shipping from Monoprice et al. At the Radio Shack, I paid $6.29 for an RCA Y-adapter.
I am not going to Radio Shack again.