I got some Dutch thing back plugged into a laptop in the day, Only 8 bit digital, which is crap. (Picoscope's big brother?) It was slow to work right, but they kept asking for it back to add more pullup resistors. I scoped the parallel port with a real 'scope to find nothing was going anywhere near 0V, told them, and they fixed it. Then I had it on a 380V dc Drive, the fuse blew, the inductor peaked, and blew scope, probe & laptop. Burned tracks accross the boards! The small print said something about 500v max, which is also crap :-(.
I used a cheap 20Mhz, because if you were anywhere out in industry you could believe so little of what you saw anyhow, because the leads picked up noise. I never bought Tektronix, and never regretted it. Unless you know you're going to be in low noise environments, keep your money in your pocket. Then you put it back in your car, and bounce it around until the next time you want a 'scope. Buy a well specified meter - not one of these 'scope jobs, but frequency, capacitance, etc.
The fact is if you're doing component repair on site (like I was), you're a loser these days. You're doing Yes/No tests and swapping boards. The clever stuff is done back in the lab, and leave the good 'scope there.