On my 550D, I started with a Olympus 50mm f/1.8 prime using an adapter from eBay member “kawaphoto”. Cheapest adapter around, but it worked flawlessly. Now I’m using a m42 screw-mount Fujica 50mm f/1.4 with another kawaphoto adapter. It also works great, but I had to file off a tiny tab on the lens before it would fit properly. Also have some Olympus and Fujica zooms/teles that work well.
Old manual primes and adapters are the way to go if you’re on a budget. I’ve got about $30 (!) invested in my 50mm prime and I now use it exclusively unless I need a wide-angle or have to change framing quickly. It makes it feel like I could shoot by candlelight. Be sure to look at local thrift stores, pawn shops, and estate sales for these old lenses. I’ve bought all mine that way. When I find something better, I eBay the old ones for a profit.
It appears that every lens that seller has listed is specifically what you do NOT want to use on a Canon 7D or T2i.
They are all Canon FD lenses (FD being the mount that Canon used before the modern EOS autofocus cameras). Almost every vintage camera mount from every manufacturer is easily adapted to a Canon DSLR; ironically, Canon FD is one of the few that are impossible to adapt usefully. They can be mechanically adapted, but the flange distance is too deep so it’s impossible to focus to infinity. You don’t want this. Lenses that are easily adaptable with mechanical rings from eBay are old Pentax K-mount, Olympus mount, Nikon F-mount (manual focus only), Fujica/Fujinon (what I use), M42 screw mount, and many many others. And, obviously, any Canon EOS (EF or EF-S) lenses will work… no adapters needed.
So to answer your question, all of the lenses that seller has would be terrible.