Thank you Kinsella! I'm in a time crunch because I'm moving so the ones from Amazon are fine for now but I'll definitely look into that for the future.
Do you know a good place to get backing and plastic covers? The only ones I have are the few I've gotten from sellers at conventions. Once I'm settled I'll be framing some more posters and the others I would like to have in backers so it's easy to flip through and see. And show off.