1 Pikachu Illustrator
The second most expensive card that could be burdensome for your pocketbook, if you want to purchase is none other than 'Pikachu'. Pikachu is worth up to $1,00,000. One of the reasons for its high cost is that less than 40 cards exist in the world, and only ten are in mint condition.
2 Pre-release Raichu
One of the rarest and highly valuable Pokemon cards is of Raichu because a very few cards are available worldwide. The term 'pre-release' was stamped at the base of the card, which was not available in the market. It was only given to limited employees, friends, and family members. This card can cost you upto $10,000.
3 Numbers 1, 2, 3 Trainer Cards
The trainer Cards for number 1, 2, 3 are always rare to find and get. These cards are officially handed over to the World Championship winners. The value of this card increases with the age of the card, as only one card is released every year. Hence, the cost of this card can vary immensely depending upon the age of it.
4 Holographic Shadowless First Edition Charizard
It was one of the first shiny Pokemon cards that were part of the Neo Destiny expansion pack. The pokemon itself is holographic and are Shadowless and costs upto $8000. If you have already got one, you have some valuable card in your pocket.
5 Kangaskhan- Parent/Child Promo Card
The cost of the Kangaskhan card has been unpredictable. It was even sold for $1500 and can also go upto $10,000. Only the elite players who were participating in the Parent/Child Mega Battle Tournament, held in 1998, were getting honoured with the Kangaskhan promo card. It is an astounding piece of merchandise and a very prestigious card.
6 Tropical Mega Battle Cards
These rare cards were awarded to the winner of the Tropical Mega Battle Tournament, held in 1999, in Hawaii. Many kids wanted to get their hands on this card, some of them even get it by bearing a minim cost of $5000, and can go upto $10,000. This card is also considered as one of the original 'Holy Grail' Pokemon cards. (See Top 10 Strongest Pokemon)
7 Master Key Prize Card
The players who were the winner of the Trading Card Tournament in Japan, in 2010 were awarded this Key Prize card. These cards are rarely available for sales, and hardly not more than 35 cards are available in the world. The cost of these cards are worth upto $8500.
8 Black Triangle Error Booster Box
Numerous Booster Box cards were sold on eBay. These are singular cards, for which you need to spend a considerable amount (circa $8000) if you are looking to buy them. The story behind the manufacturing of these cards might amaze you as these cards were printed as a mistake when factories were supposed to stop printing 'First Edition' cards.
9 Gold Star Espeon Card
Espon is the most valuable card among all the Gold Star cards. The players that were able to meet certain criteria were honoured with Gold Star Espeon card by the Pokemon Players Club. This card has initially been the part of the POP Series 5 set of Pokemon cards.
10 First Edition Holographic Blastoise
In 1999, Blastoise was a scarce card, which started gaining attention and become quite common as time passed by. However, it is even coveted today. Many people bought it in $1500, but if are able to get it in less than that, you are lucky! (See Top 10 Pokemon Characters of All-Time)