Oscilloscopes — Buy & Sell Used Oscilloscopes

Choosing a used oscilloscope comes down to four specs, in roughly this order of importance: bandwidth, sample rate, channel count, and memory depth. Bandwidth should be at least five times the highest frequency you intend to measure — a rule of thumb that preserves the harmonics that define a signal's true shape, so a 100 MHz scope is honest only up to about 20 MHz of real-world signal. Sample rate matters next: aim for at least 2.5 times your bandwidth, though most modern scopes far exceed that. Channel count is a workflow decision — two channels suffice for basic work, while four (or a mixed-signal model with added digital channels) is standard for embedded and power debugging. Memory depth, often overlooked, determines how long you can capture at full sample rate before the scope decimates your data.

On the used market, two factors swing price more than condition does: software-enabled bandwidth and installed options. Many current scopes — Keysight's InfiniiVision X-Series, for instance — ship bandwidth as a license key, so a physically identical unit can be worth substantially more if it's been upgraded to a higher tier. The same applies to protocol decode, function-generator (WaveGen), and digital-voltmeter options. When you request a quote from us, the model number alone isn't enough; the enabled licenses are what set the value. Calibration status matters too: a unit with a current, traceable calibration certificate commands a premium and saves the buyer a recalibration cycle.

Buying refurbished rather than new typically saves 40-70% off list, and for instruments this mature the performance gap is negligible — a five-year-old 1 GHz scope measures exactly as well as a new one. The categories where we see the strongest value are mid-range bench scopes (Keysight 3000/4000 X-Series, Tektronix MDO/MSO series) and higher-bandwidth Infiniium and real-time models, where new prices climb into five and six figures. Whether you're sourcing a unit or retiring one, send us the model and its options and we'll quote within one business day.