Walmart B&M stores have the 3M Worktunes hearing protectors with built in radio and aux jack for as low as $5. Most stores in my area have them for $19 which is still pretty slick.
Good luck and as with all clearance deals YMMV!
https://www.walmart.com/ip/3M-Wor…k/15574016
http://brickseek.com/walmart-inve…u=155740