For me (right now) I keep freezing up while trying to purchase Anything from the Old Lady at the Junk Yard.

I've have it freeze up a couple of times durring heavy battles; esp. when trying to get into pipboy to add a stimpak. I try to save by waiting durring my travels, so I don't lose too much progress, but thats not to say it hasn't been inconvienent.

I had that happen once. Are you buying a lot of items at once? If so, try buying one or two items, purchase, repeat, until you have all of the stuff you want from her. That's how I worked around it.

Thanks. Yeah, I tried that before i had posted. I purchased A playing card, completed the sale. As soon as I hit circle to close that menu,.... it froze. Really, all I want is that weapon mod. I can only hope that i'll find it elsewhere.