Up for sale here is an Audio Techinca (model AT-899 + AT-8537) set in great condition! This lavalier mic was used in a private, smoke-free production studio and has been well-cared for. Comes with Lav mic, case, 8537 power supply, battery, original case, and owners manual- (everything included is as-pictured).
Here's a great way to build your mic closet without breaking the bank!!!
Asking $49
More info from Audio Technica:
The AT899 subminiature omnidirectional microphone is engineered for intelligible, accurate voice reproduction. Its low-profile design (a mere 5 mm in diameter) assures minimum visibility. The mic may be worn as a lavalier and is easily hidden in clothing or hair.
AT899: 9.8' (3.0 m) permanently attached cable terminated with TA3F connector; AT8537 power module (with 80 Hz high-pass filter) for battery or phantom power.
Features:
Maximum intelligibility and clean, accurate reproduction for vocalists, lecturers, stage and television talent, and houses of worship
Low-profile design (a mere 5 mm in diameter) is ideal for applications requiring minimum visibility
Operates on battery or phantom power (wired configuration)
All wireless models available in either low-reflectance black or beige
9.8' (3.0 m) cable permanently attached to mic (termination dependent)
RoHS compliant—free from all substances specified in the EU directive on hazardous substances
Specifications:
Microphone Element: Fixed-charge back plate, permanently polarized condenser
Polar Pattern: Omnidirectional
Frequency Response: 20-20,000 Hz
Low Frequency Roll Off: 80 Hz, 12 dB/octave (wired only)