What frequencies, how many channels of analog/digital, what bit depth, how much memory, etc? What is your actual application? And what do you mean "PC attached" here? What is your budget?

I don't think you are going to find much for less than a Picoscope.

Maybe something like the Analog Discovery 3? Under 400 USD, 2 channel oscilloscope (30 MHz), 16 channel digital, 2 channel arbitrary waveform generator (12 Mhz) https://digilent.com/shop/analog-discovery-3/

Rigol and Siglent both make mixed signal scopes that will do two channels analog at 100MHz and 16 channel digital for ~1k USD.