The first few annuals, like Lion, are pretty common and seem to have survived well. It's the first laminated ones starting at 1961 which seem to be in short supply. If you see 1961 to 1964, grab them while they're hot!
You wonder why the early Tiger and Lion annuals are so cheap, even on the rare occasins they turn up in high grade. Market forces I guess. The 1960s annuals are just much more collectible than 1950s ones.
Note: some PR issues may have no value. Selected issues in FN, VF or VF/NM may not exist in some titles.