For me, I do not only like these scopes, I love them! And on my high voltage bench I only use these scopes as PM3394B models with all options.
If it is just a PM3384 I would stay away, they are too old by now and had a few hardware problems. (Original Fluke View Software will not work)
If it is a PM3384A, (First major revision), may be, what options are installed? (Original Fluke View Software will sometimes work, very flaky)
If it is a PM3384B, that passes all test procedures, go for it.
- best even having extra memory and
- math option installed
On this one, the original Fluke View Software will not work perfectly
Make sure when the scope is warmed up, that the trace has no offset from the ground reference in ANALOG and DIGITAL mode.
After at least 10 min warmup run a self calibration with the CAL push button and check the trace again to be on the ground reference in both modes.