Lucky Harith

Lucky Harith is a Caravan Merchant in Fallout 3. He is armed with a Combat Shotgun and has a cap, goggles, and a yellow mechanic's suit. Lucky sells weapons and ammo and also offers repair services for a fee. He follows a trade route that begins and ends in Canterbury Commons. His inventory can be upgraded by speaking to the founder of Canterbury Commons.

Shishkebab Schematic
Lucky Harith also has one of the three sets of Shishkebab schematics. You may kill him or attempt to pickpocket him to get the schematics. Pickpocketing often fails and results in a fight. If you kill him, you may also take all the weapons in his shop by using his caravan.

Investment
Lucky Harith has a repair skill of 20, but after talking to Uncle Roe for further Caravan Merchant investment, his repair skill jumps to a maximum of 70 (allowing him to repair items to a maximum of 82%).

Lucky's local inventory can be found in the footlocker in Uncle Roe's house [Maybe to make sure you cant lose his inventory?]. The key can be recovered from his corpse.

Location
Lucky Harith appears outside of frequent stops every time you fast travel to that location, go through a loading screen to that location, or wait at the site for a few hours. A good way to find him is to fast travel to Rivet City and go down the metal stairs. If he isn't there, wait for one or two hours so a merchant spawns. If the merchant isn't Harith, wait for one or two hours again. Repeat until you get Lucky to spawn.

Trivia
If you ask Uncle Roe about Lucky Harrith he says that Lucky is also a very good martial artist, however, Lucky does not appear to have any unarmed fighting skills.