Walmart offers the Brother MFC-L2685DW Wireless Monochrome All-in-One Laser Printer, which also faxes, copies, and scans, for $124 with free shipping. That's $16 off and the lowest price we could find, although it was $5 less in May. Features include:
Up to 2400x600 dpi printing
up to 24 ppm print speeds
250-sheet paper tray
35-sheet automatic feeder
You very likely are putting your laptop battery into an early grave.