Maestro (effects) Phasers & Shifters for sale in the USA

At least 8 eBay results for Maestro octave and pitch effects
At least 3 Reverb results for Maestro octave and pitch effects
Maestro OB-2 1970s for sale

Maestro OB-2 1970s

Maestro OB-1 Octave for sale

Maestro OB-1 Octave