Newegg offers the Rosewill V. 92 56Kbps USB Modem, model no. RNX-56USB, for $14.99. Apply coupon code "VCO" and checkout via Visa Checkout to cut it to $13.49. With free shipping, that's the lowest total price we could find by $2. It supports Windows Plug-n-Play, downstream speeds up to 56Kbps, and upstream speeds up to 48Kbps.