I found this at a comic book store on the “throw away” table in the early 90’s . It wasn’t marked for price, and when I asked, the clerk just shrugged. “Three bucks?” he asked. I paid the man. This UK special reprinted Uncanny X-Men #139 and #140 from 1980 (a couple years after I had stopped buying comics so it was a fun purchase).
Wolverine and Nightcrawler visit Canada and the Alpha Flight team and run into Wendigo! It also includes a nice illustrated prose story that basically retells #100.