Mwave offers the Premiertek Dual Band 3dBi/5dBi Ceiling Mount Omni Antenna, model no. ANT-C8025-NF-3, for $28.99 with free shipping. That's the lowest total price we could find by $1. It provides 3dbi and 5dBi gain and is suited for use with cellular GSM, DCS, PCS, and 2.4GHz WiFi signals.