I think that eBay has helped us and am glad as a collector to have used it for the past 5 years plus! It has really given me an excellent opportunity to add some sick cards to my Griffey PC which I'm sure would be very hard to get otherwise such as at local card shops or even card shows! It has also been a great place to sell some of my cards that I was willing to part with in the past and the audience for selling them being worldwide has been a success. It's great to have an online site that brings collectors together for buying and selling and I wouldn't want it any other way!
Check out my AMAZING Griffey collection http://s248.photobucket.com/albums/gg199/Tpm2780/