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Honus Wagner's baseball card in the T206 series is one of the most coveted of its kind.

A slightly-damaged T206 Wagner card surfaced earlier this year when a man left it to the Baltimore's Sisters of Notre Dame as part of his will.

The card is being auctioned off with all proceeds going to the Roman Catholic nuns and is expected to sell for between $175,000 and $200,000.

That's chump change compared to another card from the collection that was sold for a startling $2.8 million two years ago.

Here's a look at some of the rarest baseball cards worth big bucks.

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