I got my first CRO from the US, $80 for a good 60MHz and $80 shipping with no duties or anything. A local technical school had a few fixies that could be had, and even sold after to get a better one. I haven't a clue what kinda hobby stuff you wish to do, but most people tend to only actually look at frequencies and if a signal is on or off or roughly the right shape or duty cycle - so a DIY one with an ADC could be an option, or sound card oscilloscope, etc. for beginning.