The bunker quest

[Fahrenheit]

So the bunker guy is in junktown, we went to him, got his beer and caps and all, yet neither me or any of my fellows couldn't get the right dialogue option. We wanted to buy the bunker for 350k. We are sure we checked all the possibilities. What could be wrong?

[Kilgore]

You need to complete the quest first. Not a bug, many people have already done this.