I am looking for the MVT 7000 or 7100. The unit must be in good working condition . Most important: the rotary frequency change knob must operate. I use it t0 design SAW transmitters and it helps to plot the tolerance with RSSI as you swing that Frequency select knob. My unit finally died after 15 years and after buying a 'new' 2184 Radio shack triple trunking Scanner find myself disappointed to say the least. For my work the MVT was better. Please post if you have one! Thanks, MichaelPGS