I've purchased a number of "restock", "close out", "refurb" stuff from MF. I've found some stuff near perfect and without issues but other stuff (and more so lately) absolutely horrendous.
Case 1: My Ampeg BA-600 (1x15). It was "returned" and I got it at great price. It showed up in a box that was pretty beat up but still functional. Unfortunately, the amp WASN'T functional. I returned it and got a new BA-300 which has been a nice amp.
Case 2: I ordered a returned Crate power amp. It was in a box that was literally held together with duct tape.

Yup! 1001 uses including shipping audio equipment. I slit the tape to open the box and realized the tape was essentially the box. The box was completely torn and deteriorated. The surrounding packing foam for the amp was completely compressed and crumbling.
Now to the amp: The frame was bent and screws were loose. The rack ears (tabs) were bent to the point you couldn't rack the amp. It was like someone tried to "dog ear" a page in a book. One of the amp handles was loose and the other was completely off. They did include the bolts for it but those were roaming around the box.
I've become very careful about purchasing used/refurb items from the (though I still do). But I've noticed now they have a used rating system on their website when they never did. I do go by that and it's been pretty accurate. Maybe too many returns and complaints caused the creation of the new rating system.