This touch screen cheaposcope is actually good! DSO112A Oscilloscope

Buy one:
Or many? Who am I to set your limits?
Halp:
This tiny 2MHz Oscilloscope has everything it needs to be a real oscilloscope. Adjustable timebase, V/div setting, a lot of trigger and measurement options and freely draggable cursors.
Open source Arduino ECG Shield with schematic: /