some are and then some are not worth anything...if it is bent it is not worth anything
No, Marvel cards are not really worth a lot of money. However, many baseball and basketball cards are worth big bucks.
Depends what the cards are. Some are worth a lot, some are almost worthless.
it depends on what cards you sell some can be worth a lot but can be worth less i suggest you research them
A lot
They may be a collectable worth a lot depending on their appearance and rarity.
$20000 A lot!
Original art trading cards are valuable because original art is worth a lot.
yes
That depends on what cards those are. If you have rare cards from the 1980 and down, than a lot, but if you mean cards from 1990 to 2008 than not a lot. If the cards from 1990 to 2008 are rookie cards, and they are very very good players, like the 1993 Derek Jeter rookie card than those will be worth a lot of money. Of course if its an auto or memorabilia than obviously the card value goes up.
Depends how much you think they are worth
Depending on a card's level of rarity (Rare, Super Rare, etc.), how many of that card were printed, and its popularity, certain Yu-Gi-Oh! cards can be worth a lot of money.
Depends on the card. Some good players will be worth a lot, others won't.