As the card-collecting world continues to heat up, demand for Blastoise Pokemon cards continues to follow suit.

After all, Blastoise is one of the most iconic characters in the entire franchise...

And much of Blastoise's popularity can be traced to its debut as the cover mascot of the original Pokémon Blue video game.

Since then, Blastoise has remained one of the coolest-looking of all Pokémon with its twin water cannons that retract from the shell on its back.

Nowadays, many of those kids who grew up with these cards are now adults with more spending power able to pay big bucks for them in top condition.

Some of them are among the most expensive Pokemon cards in the hobby.

And in this guide, we take a look at the 20 most valuable Blastoise cards.

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In today's red-hot market, the demand for Charizard Pokemon cards has never been hotter.

Considering that Charizard is easily one of the most iconic characters in the entire franchise, it's easy to understand why card prices continue to soar...

And much of Charizard's popularity can be traced to its debut as the cover mascot of the original Pokémon Red video game.

Since then, the dragon-like character has developed into an icon for the Pokemon franchise and collectors are willing to pay huge price tags for some Charizard cards.

Some of them are among the most expensive Pokemon cards in the hobby.

And in this guide, we take a look at the 15 most valuable of them all.

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I'll never forget the first time I laid my hands on a small stack of 1971 Topps baseball cards...

When I was a kid, I would often visit my grandparents on their farm, and one weekend, I saw a pile of maybe 300 or so vintage cards that spanned across the 1970, 1971, and 1972 Topps sets sitting on a bookcase.

The cards had belonged to one of my uncles and my grandma had dug them out to show me since she knew how much I loved baseball cards.

Though there wasn't much to see in the small number of 1970 and 1972 Topps cards, there were a bunch of 1971 Topps, including two huge ones:

a Reggie Jackson and Tom Seaver.

I couldn't believe my eyes when I saw those two cards...

I had only seen names like that as I skimmed through old Beckett price guides but never had I seen them up close.

To this day, those two cards and the entire 1971 Topps set are some of my favorites.

And in this guide, I'll run through the twenty most valuable.

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Whenever I look through some of my old 1989 Fleer basketball cards, I'm immediately overwhelmed with nostalgia.

While there may not be any huge rookie cards in the set, one thing stands out clearly:

the checklist is loaded with big-name stars of an era marked by fierce competition and bitter rivalry.

Of the 168 cards in the set, 24 of them are Hall of Famers.

And many of these guys are considered among the very best at their respective positions in NBA history.

There is just so much to love about this set.

And in this guide, we look at the 20 most valuable.

Let's jump right in!