TCL 10000BTU Portable Air Conditioner – Link 
Amazon has this currently marked down to just $254.96 w/ free shipping!
This was selling for over $400 last month and is now at a record low.
- Energy efficiency Ratio (EER): 10.2
- 12,000 BTU portable air conditioner with caster wheels and integrated side handles for easy movement
- 5.9-Ft. Power cord with lcdi plug uses 3-prong 115V electrical outlet
- Cools a room up to 270 sq. Ft. With dehumidification up to 5.7 pints per hour
- Programmable 24-hour on/off timer Cools on your schedule