[magnets]

It depends on your team and if you only have 120V in your shop.

Personally, I wouldn't buy any Grizzly products.

I've used an RF-45 mill, (it might be the same as the PM-45, but not sure), and it's actually pretty good, especially for the price.

Used is definitely a good option too. If possible, try to get it from a corporation or machining center that's taken good care of it. We've reached out to local businesses to get a 1960's bridgeport and a 1960's south bend lathe. These are two of our main machines during build, and we got both for under $2k.
If you do buy used from a company, ask if they'll give you some old tooling. These places typically throw out endmills after they've been reground to too small of a diameter, but they still work very well.