I have a classic 150 MHz Tektronix 454 oscilloscope for sale. More details on the specs are at https://w140.com/tekwiki/wiki/454#:~:text=The%20Tektronix%20454%20is%20a%20150%20MHz,can%20be%20seen%20as%20an%20improved%20453.
I’ll sell you my Tektronix 454 oscilloscope for $90. Prices that recent buyers paid on Ebay for a Tektronix 454 oscilloscope range from $96.71 ($59 plus $37.71 shipping) to $229.
If you’re interested, call or text me at (612) 888-5766. My address has outdoor electrical outlets that you can use to try out this oscilloscope and make sure that it works as expected. I do NOT have a BNC probe, but I encourage you to bring one (and anything else you need to verify that this oscilloscope works). As of this writing, I do have a signal generator (also for sale) that can help you verify that this oscilloscope works.
Jason Hsu, AA0II