Crazy Wolfgang

Crazy Wolfgang is an eccentric Caravan Merchant specializing in the sale of junk. His inventory includes random bits and pieces used for constructing weapons, and also a copy of Rock-It Launcher schematics.

He can repair up to 15%, but after talking to Uncle Roe for further Caravan Merchant investment, his repair skill jumps to a maximum of 75, the highest in the game (allowing him to repair items to a max of 85%). If you reverse pickpocket a near fully repaired +5 Repair article of clothing he can repair up to 88%. Crazy Wolfgang can sometimes be found just outside Megaton and any other place Caravan Merchant stops.

Crazy Wolfgang's local inventory can be found in Uncle Roe's house in the first metal box in the corner. The key can be recovered from his corpse.

Once you full invest into his shop he will sell Pre-War Books. However, these books are blue in color and have a value of 5, and cannot be turned in at the Arlington Library.

Trivia
Agatha includes a shout out to her "old friend" Crazy Wolfgang in her broadcast, saying "no one can scour the wasteland and find such oddities as you".

Bugs
Usually, if you successfully pickpocket Wolfgang and steal his Rock-It Launcher schematics, you can then immediately buy another from him (giving you two schematics for the price of one!The guy who put that there is also probably unaware that you cannot, I repeat, CANNOT sell schematics. Dumbass.).