That's confusing!
The auction title says:
TOPPS WACKY PACKAGES 1973-1977 SERIES 1-16 SETS CHECKLISTS
The auction description header says:
TOPPS 1973-1977 Wacky Packages Cards-Sets / Stickers Series 1-16 & checklist puzzles
Then, finally, at the bottom of the description it says:
16th Series Complete Checklist Puzzle Set (9) no stickers.