Nice thing about getting the E Series is when you are really and able to move up to AF Prime or CinePrime you can sell them for what you paid for them.
I just got the 135 2.8 for under $50 with shipping. I go get an adapter for each lens and I got $15 which fit really well but the edges are bigger then the aperture ring so they kind of get in the way. Remember you should also get new rear end caps for each adapter.
Each E series lens with get
a Nikon to EOS adapter
a Canon end cap (cheap 3rd party)
a 52-58mm step up ring
a 58mm lens cap
I’m doing the a step on each cause I got just one Variable ND filter at 58mm so it fits the nikon and canon lenses.