Anyone having & wanting to sell any of the below listed K-3 roofing filters please reply privately to me off the list with your price. Thanks de KE4WY Jim KFL3A-400 400 Hz, narrow 8-pole roofing filter KFL3A-500 500 Hz, narrow 5-pole roofing filter KFL3A-2.1K 2.1 kHz, 8-pole roofing filter KFL3A-1.8K 1.8 kHz, 8-pole roofing filter