Thinking about selling your coin collection? To get the best price for your coins, you’ll need to research – and this is guide serves as great place to start. photo byTom Small Coins are valued by a variety of factors, the most common being: Grade, Rarity, Interest, and Liquidity. A...
1. A phone card revaluing method for altering the value of a user's phone card by way of an electronic commerce terminal system comprising the steps of: a) detecting whether a phone card has been inserted or swiped in a card reader coupled to said electronic commerce terminal, said phone...
& S.A.: Data Collection and Curation R.K.: Overall Supervision and Guidance. Competing interests The authors declare no competing interests. Additional information Supplementary Information The online version contains supplementary material available at https://doi.org/ 10.1038/...