Mwave offers the Premiertek Outdoor 24dBi Super High-Gain Wireless Antenna, model no. ANT-GRID-24dBi, for $42.99 with free shipping. That's the lowest total price we could find, although we saw it in May for $3 less. (It's a current low by $6.) This antenna has a frequency range of 2.4GHz to 2.48GHz and gain of 24dBi.