What do you consider reasonable? If you want to keep these for a lifetime, you will want it matted with acid-free mattboard and behind UV protection glass and a sturdy frame. You do not want a cheap dorm room poster frame or do you? Frame one poster a month or so until you have your collection all framed.
Check the phone book for custom framing. Many larger craft stores do custom framing.
"I've had two years to grow claws, Mother, and they're Jungle Red!" Mary Haines - The Women