Heather - Welcome to the site!
A cheap, good quality tape player...

I would check in the 80's.

Sorry, too early for jokes?
Most of what you'll find will be CD players but a good tape player can be handy for taping your own dialogues (or dialogues with a friend.) Good luck finding one. Try a recycle store or any garage/yard sale (that might hit the super cheap target but maybe not the quality issue.)
Happy teaching!
- Mark