I found an 18000 piece Ravensburger “Skyline's of the World” puzzle, with all 4 bags still sealed, at a local thrift store for $5 today 🤗 : r/Jigsawpuzzles
18000, Ravensburger, Skylines of the World - Rare Puzzles
Ravensburger Tropical Impressions 18000+ pieces. Photo prior to pasting - laid out on the garage floor!
Amazon.com: Ravensburger Magical Bookcase 18,000 Piece Jigsaw Puzzle for Adults – Softclick Technology Means Pieces Fit Together Perfectly : Toys & Games
18000, Ravensburger, Historical World Maps - Rare Puzzles
NEW AND SEALED Ravensburger - Paradise Sunset Puzzle 18000 piece Jigsaw Puzzle | eBay