Newegg has the Rosewill RNX-EasyN4 Wireless Broadband Router with 2 dBi Antenna x2 for $30 with free shipping.
Features:
• x4 built-in high performance 10/100Mbps Switch Ports (Auto-Crossover)
• x2 high gain Omni directional 2 dBi fixed antenna connecting for the best wireless signal.
• Quick hardware button for WPS setup to enhance the security.
• Easy setup with Wi-Fi Protected Setup (WPS).
• 802.11b/g/n 2.0 provide further coverage, less dead spot and higher throughput.
• MIMO technology throughput up to 300 Mbps for Ralink 2T2R solution.
• Supports MIMO technology with 2 external 2 dBi SMA Antennas
• Support Cisco CCS V1.0, V2.0 and V3.0 compliant WPS.
• Wireless Multimedia Enhancements Quality of Service support (QoS) / enhanced power saving for Dynamic Networking
• RNX-EasyN4 is also fully compatible with all other IEEE 802.11b/g devices.
• Web configuration compatible with both IE and Firefox.
Newegg.com - Rosewill RNX-EasyN4 IEEE 802.11b/g/n Wireless-N 2.0 Broadband Router (2T2R) Up to 300Mbps Data Rates/ WPA Personal and Enterprise, WPA2, 64 & 128 bit WEP, PSK, TKIP, AES, WPS Security with 2 dBi Antenna x2 - Wirel
For $7 more you can also get a
Refurbished Netgear WN121T RANGEMAX NEXT WIRELESS-N USB 2.0 ADAPTER.
Rosewill RNX-EasyN4 Wireless N Broadband Router with 2 dBi Antenna x2 $30 + FS 
