Affordable DSO LCD Oscilloscopes for beginners (from $239) and professionals (to 3.2 GS/s). USB Oscilloscope Disco-2
Hantek Idso1070a 2ch 70mhz Original Iphone/ipad/android/windows Wifi Usb Oscilloscope 250msa/s 2 Channels Bandwidth Support - Oscilloscopes - AliExpress
Rigol VS5102 PC USB Oscilloscope and Logic Analyzer
Amazon.com: USB Oscilloscope, PC Based Dual Channel 25MHz Digital Oscilloscope, Handheld Mini Digital Storage Oscilloscope, Multi Functional, MIT USB Isolation, with Probe : Industrial & Scientific