Meritline offers the Edimax 802.11n Wireless PCI-Express Adapter, model no. EW-7128Gn, for $19.99. Coupon code "MLC216TN" cuts it to $13.99. (newegg charges the same via coupon code "EDIMAX30".) With free shipping, that's a buck under our June mention and the lowest total price we could find by $13. This features an external detachable dipole antenna with a 10-foot cable. Coupon expires after 100 uses.