Are you mean I can sell that there?Instead start a verification service i would suggest you to sell these on ebay. with custom credit request. Then you can provide quality service.
IF you start a verification service i am sure you are going to ending up using same number again and again and it cause high risk (account linked) who got verifieds from you.
Instead sell for a price. It's more profit than you think. Check out ebay or you can even start a BST here.