How much would a moonshots,Mike Piazza, Fleer ultra card be worth?

It is worth exactly the amount someone will pay you for it. No more.

I wish that we had a collectible card expert on this site. But unfortunately for right now, we don't. These kinds of questions come up fairly frequently here. You might want to put the two words, "baseball cards" in the search option at the top of this page to questions that have been similar to yours.

Also, when looking for the value of collectible cards, please keep in mind that the condition of the card makes a huge difference in how much it might be worth. Card collectors get really picky about the conditions of the cards when determining a possible value for them. So, it really would be best if an expert could be viewing the card in person.

Other resources that you might want to try would be a store that sells collectible cards, a bookstore that has books on collectible cards and also, a public library.

Here are also some other links that might be helpful to you:

Baseball Card | Value Price Guide | Selling Cards Worth

Baseball Card Value Price Guide based on prices realized in auctions. Email alerts on pending eBay auctions at no cost to you. Basketball, Football, Hockey and Boxing Card Price Guide. Track Card Values like a Stock Portfolio. VintageCardPrices.com

https://www.askmehelpdesk.com/sports-...rds-31251.html

https://www.askmehelpdesk.com/hobbies...baseball+cards

https://www.askmehelpdesk.com/collect...baseball+cards

https://www.askmehelpdesk.com/basebal...baseball+cards

https://www.askmehelpdesk.com/collect...alue-9447.html

go to your local hobby shop, or comic store, they may have one of two books called "beckett" magazine be sure to get the baseball edition, and also "tuff-stuff" magazine there is only one compilation in this one. They will both have accurate values in them. :)