Date Region Description Price Seller
USAVintage doctor q pedal ) Worked perfectly last time I used and should be...$80.00
USAVery nice condition vintage Doctor Q. Works perfectly, and has the aweso...$120.00
USAHello!Up for grabs is a clean vintage Doctor Q by EHX. Has some wear and...$130.00
Canada1979 Doctor Q Envelope Filter tested working perfectly. All original. Go...$189.00
EUPower: BatteryPotentiometer is dated 1976.The EHX Doctor Q is an envelop...$269.69