Just adding to the thread. Here is a little something I saw on the gmagrading.com website.
1989 Upper Deck Ken Griffey Jr. rookie card- This is one of the greatest baseball cards in the hobby. This card is also one of the most frequently graded rookie cards in the industry. These Griffey rookies are not scarce so we advise that if you intend to invest in one that you only purchase them in high grade condition. You can find a Gem MT 10 version of this card on Ebay for about $100. Beware of counterfeits of these cards as they are plentiful in the hobby.
1989 Upper Deck Ken Griffey Jr. rookie card- This is one of the greatest baseball cards in the hobby. This card is also one of the most frequently graded rookie cards in the industry. These Griffey rookies are not scarce so we advise that if you intend to invest in one that you only purchase them in high grade condition. You can find a Gem MT 10 version of this card on Ebay for about $100. Beware of counterfeits of these cards as they are plentiful in the hobby.