Depending on what year the card is from, you can be sure that the Barry Sanders rookie card that you have could well be valuable. The most precious card is from the year 1989 so will therefore be worth the most. If you have a card from any other years you are going to have to research to see how much they are selling for.
If you are looking to sell online it is in your interests to look on many different bidding websites to see how much people are selling the cards for. Alternatively you can see if there are any online for a fixed price as this will also give you a good idea of its value. If you cannot find what you are looking for online, you can always go into a local card or comic store who might be able to give you the price that you are looking for. They should at least give you information on the Barry Sanders card that you have and how much they would sell it for in their store.
Once you have the price of your product it is up to you whether or not you sell a how you sell it. People will likely think that they can get more than the asking price for the best Barry Sanders card that is on the market today, as long as they have the right buyer. If you are sure that you have the right card from the right year you should be able to get close to the price you are asking for.
If you are looking to sell online it is in your interests to look on many different bidding websites to see how much people are selling the cards for. Alternatively you can see if there are any online for a fixed price as this will also give you a good idea of its value. If you cannot find what you are looking for online, you can always go into a local card or comic store who might be able to give you the price that you are looking for. They should at least give you information on the Barry Sanders card that you have and how much they would sell it for in their store.
Once you have the price of your product it is up to you whether or not you sell a how you sell it. People will likely think that they can get more than the asking price for the best Barry Sanders card that is on the market today, as long as they have the right buyer. If you are sure that you have the right card from the right year you should be able to get close to the price you are asking for.