There is an interesting thread at WebmasterWorld forums on the topic of saving Google AdWords accounts. You know how Google has this quality score component to AdWords? ;-) Well, sometimes an ad or ad group or account has a very low quality score, making your cost per click prices soar. Some call this the Google Slap.
That being said, if the quality score gets really bad, is it ever worth ditching the account and starting fresh?
eWhisper, WebmasterWorld moderator, said that in "almost every case, an account can be 'saved'." Saving your account might be time consuming, but it seems like the general consensus is that it is almost always worth saving the account, as opposed to starting new.
How exactly can you save a 'lost' AdWords account? Well, I'll leave those details to the thread.
Forum discussion at WebmasterWorld.