I am not exactly sure about value. If you plan on selling it I would send it to PSA DNA in California to authenticate it. They are not perfect, but they are the best as far as third party authentication goes. Buyers will also pay more.
No problem. Certification is probably around $150 including shipping. They have directions on their website. I would only recommend it if you plan on selling because I know that people will pay a lot more for items authenticated. I have sent some stuff there in past. I think its worth it although the turnaround time is a few months.