【FNRSI Upgraded 2in1 DSO-510 Oscilloscope with 10X Probe】Digital Portable Oscilloscope/DDS Signal Generator Automotive 2.8 inch TFT, 10MHz Bandwidth, 48MS/s Sampling Rate, Auto Trigger Function

Edit: I'm reviewing the transistor thing. Brb This scope would do it for you. Anything cheaper has garbage bandwidth that isn't worth your money. But this would get you started if you have nothing and a low budget. https://www.amazon.com/dp/B0DKK5VB79