I collect old news papers dating back to the 1500's and it really depends on what kind of paper. Ideally if you really want to keep it for a long time, do not frame it and put it on display in a picture frame. Sunlight and moister will do a number on them. Up until the mid to late 1800's most paper had a high rag content, after that it was more wood pulp which means more acid which means even more of a challenge to preserve.
I store mine in portfolios I purchase from
Storage Display Options - RareNewspapers.com.
Here is a issue of the London Gazette from October 9th, 1673.
If you want the best of both worlds, store the original in a portfolio and display a copy of it.
However if you still want to frame it:
Some people like to have their special newspapers framed and hang them on the wall for decoration. If you do, keep these factors in mind:
• Hang it on a wall that does not get direct sunlight, such as a hallway or basement wall
• Have it framed with an acid-free backing board and matt
• Use only glass that has UV ray protection (this will help but you still need to keep it from direct sunlight exposure)
HistoryBuff.com -- How to preserve historic newspapers
I would try to keep the entire paper as you will have a bigger market to sell it to.
Good luck!