Let me set the scene for you. I have just completed 'Come Fly With Me', which got me all the way to level 6 and most of the way to 7. My combat style is gunslinging, so I have That Gun as my primary weapon, and Lucky (a unique .357 magnum with a higher crit chance[you can find it in the Bison Steve]) as my backup. I strode out of Novac at about 2:00 AM, feeling kind of proud of myself. I've just passed Old Lady Gibson's, when I hear:
The Caesar has marked you for death, and the Legion obeys. Ready yourself for battle!
Lemme remind you here: I am level six. This was a full-on hit squad, complete with a Centurion armed with a thermal lance. I don't have snowball's chance in a server room. After dying, I reload my quicksave, and start out again. I quicksave right before the point where I got attacked, and then I switch in AP 5.56 ammo for That Gun. I then fight them again. *quickload* And again. *quickload* And again. *quickload* And again. *quickload* And again. *quickload* And again. *quickload* And again. *quickload*. Finally, I say 'Screw this' and proceed to inject myself with various needles and swallow the contents of various containers. Some Med-X, some Jet, some Rebound, some Steady, some Mentats for good measure, and I'm ready to go.
I blew through most of my AP ammo, but I finally managed to kill all of them. I looted the bodies, and then, over-encumbered, began the trek back to Old Lady Gibson's. Then I wait outside for five hours until she comes out. I can imagine my character saying
Hi, I got attacked by a Legion hit squad last night, can I sell you their gear?
I don't have any points in barter, but I still got 1500 caps just for the thermic lance. The centurion's armor was worth another couple hundred, and the rest of their weapons were worth another two or three hundred.