I am probably just restating what Arista.MD so eloquently wrote. Paying a collection will absolutely not affect your FICO score. The damage has been done and for seven years, you will pay the consequences by having a low score. (No one actually knows how this score is calculated). If you don't believe me - as it appears many don't - see below:
http://www.yourbestlo.com/best1/ficoo.htm
Pay your bills on time. Delinquent payments and collections can have a major negative impact on your score.
If you have missed payments, get current and stay current. The longer you pay your bills on time, the better your score.
Be aware that paying off a collection account will not remove it from your credit report. It will stay on your report for seven years.
If you are having trouble making ends meet, contact your creditors or see a legitimate credit counselor. This won't improve your score immediately, but if you can begin to manage your credit and pay on time, your score will get better over time.
If you still are unsure, see below:
http://www.sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/2001/06/28/BU170831.DTL&type=business
Even if the collection agencies had notified Equifax of Knight's eventual debt repayment, it probably would not have improved his credit score by much, if at all.
Craig Watts, a spokesman for Fair, Isaac, says credit scores attempt to predict whether someone will repay their debts, and past defaults or delinquencies are given more weight than ultimate repayments.
But as Arista.MD pointed out - and in the most respectful of ways, I might add - there is the human factor. This was certainly the point mshheaddoc, a mortgage broker, was trying to make. According to her, if you do not pay the collection, she will not loan out the money. Fine. That's the way they do things in her company. Therefore, while the FICO score will not improve upon repayment, an individual broker or lender may look at the collection and consider you a risk. However, I'd like to see a lender who wants to have a successful, competitve business deny a person with a score of 790 but some measely collection of $200 a loan. It just will not be a wise business decision for that lender. For a discussion of these ideas, see:
http://community.lawyers.com/messageboards/message.asp?channelId=26&subId=&mId=501234&mbId=82Yes, you are right it does not make a difference on the FICO score, but it will make a difference to the person who is going to decide whether to risk giving you the money or not.
Finally, my posts were meant to aid the OP and not to advance any high perceptions that nameless, faceless people behind the screen might have of me. I am only trying to help as countless other people have helped me on this website. That said, I suggest you refrain from angry tantrums, ill-formed arguments peppered with foul and offensive retoric. Civility will only enhance the debate. It is through good debate that the truth is often revealed. I reserve the right to be wrong.
Anecdotally, to this day, I have a $130 collection on my account and I have a score of 792. I have yet been turned down for a loan. This is why I feel very strongly on the subject.