Staples has the Brother HL-L2320D Monochrome Laser Printer on sale for $50.  It's a duplex printer (prints on both sides of the paper). Generic toner is cheap.

https://slickdeals.net/f/13323823-brother-hl-l2320d-us-black-white-laser-single-function-printer-staples-49-99









Office Depot has the Brother DCP-L2550DW Wireless Monochrome All-In-One Laser Printer on sale for $85.  generic toner is a little higher for this printer.  It's also a duplex printer.  Also it has a scanner and or copier that can be used without a computer.  This printer is similar to the printer I have used for 3 or 4 years. 

 https://slickdeals.net/f/13322416-brother-dcp-l2550dw-wireless-monochrome-laser-all-in-one-copier-printer-scanner-84-99?attrsrc=Test%3AHideExpiredSearch%3AHide%20Expired&src=SiteSearchV2_SearchBarV2Algo1