On Ebay...saw this... (cant put the link here due to regulations here).
RADAR DETECTOR WHISTLER SPECRTRUM 1 X-Band K-Band.
You are will get a new high performance Whistler Spectrum 1 radar detector for X and K band. It has a 12 Volt DC car plug, high sensitivity, digital display, highway filter mode, volume control, X and K band audible differentiation, memory retention. It will be shipped with original carry case and in its original package.
You can use the detector as testset for other microwave radiation. Therefore the internal gunn microwave oscillator can be modified so it can be used as detector for other frequencies as the the radar band.
(yes....$199.00 for a Spectrum 1 radar detector from, what, the late 80's and early 90's?? what a joke!!!)