Yes, the price for the Senior Pass has been announced as increasing from $10 to 80 but the last time I checked nps.gov, last week, the end date was not given. Maybe your source had seen an updated announcement.
I read on nps.gov and/ or the BLM site that if you puchase the pass on line, there is a $10 proceesing fee as well, To avoid the fee, again. check the websites - BLM has a long list by state, of the BLM offices in that state that wil sell you the pass, in person. Apparently not every BLM office does this. I know because I called the BLM office that the list showed as a seller for my area, and obtained their office hours. The different types of passes, etc. is on those sites, when you follow the links.
(i'm sorry not to provide the exact live hyperlinks but I am not having good luck switching back and forth between CRVL messages in progress and other URLs. Newbie. Very un-Vanna-like, I keep losing letters, paragraphs and whole drafts on CRVL. CRVL site nav practice is i indicated!)w