GE 5,000/6,000 BTU Mechanical Air Conditioner, AET05LY/AEW06LY – Walmart – $69/89 – up to 54% off YMMV.

Plenty in some stores, none in some. Good enough for a typical sized bedroom.
5,000 BTU
https://www.walmart.com/ip/GE-5-0…/993795463
https://brickseek.com/walmart-inv…=993795463
6,000 BTU
https://www.walmart.com/ip/GE-6-0…/590003106
https://brickseek.com/walmart-inv…=590003106
Note for 6,000 BTU – Price could range from $40 (YMMV) to $89 (not so YMMV) depending on your zip code, ex. 60462.