I buy all my audio equipment at garage sales. Good cassette players are being given away.
Thanks for the advice, js! I hadn't thought of this. And since I don't have a stereo and I'm not about to go buy one just for this little project, this is definitely an option.
I love garage sales and used to do this all the time PK (pre-kids). I think I get it from my parents, who absolutely love doing this in their retirement years. It used to be antique stores, back when they were affordable and you could find great bargains at the roadside shops. One time we took a vacation to Missouri in a van and I swear we stopped at every roadside antique store between Cabool, Missouri and Texas. There were so much stuff in that van, us kids were twisted into all kinds of contortions just to have a place to sit! There were at least a dozen old clocks much like the one below. (Anyone know how much that's worth, by the way? It's an Ingraham eight-day wind-up.)

Sam, I'm getting to you but I have a few questions. Give me a few more minutes, assuming I don't get interrupted. If I'm not back within 30 minutes, it may be a while. You've given me a lot to chew on here. :-)