I use a 3pt mounted PTO driven 3 bag bagger on my Kubota
BX2200. Kubota brand. Probably similar one is made for Massey (??) Actually I would guess that the Kubota unit would fit your Massey. Mates to 3pt and PTO which SHOULD be about the same.
I'll make a couple of comments as generic as I can & not brand-specific:
-- A type that is PTO driven and involves NO belts is very desireable. The reasons being mostly obvious -- no belts to wear, nothing to adjust, etc. and maybe not so obvious is serious OOMPH. The thing will pull you in too if you get in the way... about an 18" steel impeller and lots of vacuum. I've seen a few Deere baggers that are inferior because of lack of this feature.
-- The bigger the bags the better -- esp for leaves. I could not handle our leaves each fall without the thing. Essential tool.
-- They WILL clog at times. Not often but all of them will clog. About 70% of the time kicking the tube that runs from the deck outlet to the blower clears the clog.
-- Cheap? Afraid not. Around $1500 and that was 10 years ago. But I have certainly gotten my money's worth out of it.
-- Leave it outdoors ? No way. I think that begs for trouble regardless of brand. Of course you can get by, sort of, with a tarp. If you have covered garage or shed space for the tractor then you probably have space to leave a good PTO driven bagger on it inside the storage area. Much better than chances of having space for a pull-behind sweeper. Even stand-alone on it's own feet the footprint is much smaller than that of a pull-behind.
-- I disagree sorta-kinda with Code 54. I cannot imagine a bagger load of leaves or grass or anything else that would significantly affect my front end getting light on a steep slope. The rear bagger I have keeps the bags very close in to the rear wheels for one thing. And full bags are just not THAT heavy.