2.4 GHz Spectrum Analyzers

"Low-cost" is a relative term when it comes to spectrum analyzers — where prices can easily go above $25,000. All items in this list are below $4,000.

• Cognio Spectrum Expert - High end PCMCIA-based spectrum analyzer for Wi-Fi or RFID. List Price is $3,995.
• Berkeley Varitronics Bumblebee - BV Systems has a few variations on the Bumblebee Spectrum Analyzer, which covers 900 MHz, 2.4 GHz, and 5 GHz. Their latest model is a tablet PC form factor; previous models were PocketPC form factors. List Price ranges from $2500 to $4000 (depending on model).
• Nuts About Nets - AirSleuth - AirSleuth is a 2.4 GHz spectrum analyzer that comes in both PCMCIA or USB models. There is a limited version for $50 with the full version priced at $395.