It has been my experience that often the Ancestry.com copy is the best available because they digitally enhance the images. If the page in question is from 1870 or earlier and you can go to NARA in Washington DC, when it reopens, bring the page up on microfilm there. Ask a staff member to determine if the page or entry is unreadable. If so, the staff member can arrange for you to see the original (they do not have the originals after 1870). Only a staff member in the research room can make this determination. One of the things that I have found is the blue ink did not microfilm well or at all, so that what appears as a blank page is quite readable in the original done by the census taker in blue ink.
Dear Ms. Elliott,
Thank you for posting your request on History Hub!
In addition to the information from the previous poster, please note that original 1880 census volumes are with various state archives and other repositories. Please see the description for the Tenth Census of the United States, 1880, for more information.
We hope this is helpful. Best of luck with your research!