IBM 5151 (MDA display) - common faults / gotchas?

So, my local bookstore guy has an IBM 5151 monitor for sale, which is surprising because: a) I haven't seen *any* vintage IBM PC kit locally in the last 8 years, b) I picked up a 5160 with an MDA display adapter but non-IBM monitor from John over in Duluth a few weeks ago, and I was thinking what a shame it was that it didn't have the original IBM screen. So, it's almost like it's meant to be, or something... Of course working condition is unknown, so before I commit to it, are there any common showstoppers with these displays (failed CRT, yoke windings, LOPT etc.) - or are whatever faults that may be typical with them all in components that are still available? (I'm kicking myself a bit because he said I was welcome to bring it home over the weekend to try it out and then bring it back if I decided I didn't want it - I just couldn't remember at the time if the 5151 was the MDA display or something else, but with hindsight I probably should have just taken it regardless!) cheers Jules