Step 1: Go here https://numberboard73.com/
Step 2: Use the ‘BACK’ and ‘NEXT’ buttons to navigate through the listings.
Step 3: You can also use the ‘Go to number’ box to search for a specific listing number.
Step 4: NFTs that are listed for sale have a ‘Buyout Price’ listed. You can simply click the ‘BUY NOW’ button and follow through the steps on MetaMask to make the purchase.
IMPORTANT: If your gas is more than $200, ‘Reject’ the transaction in MetaMask and try a different listing number. The high gas cost is MetaMask’s way of telling you that the listing you are trying to claim has already been purchased. Failure to ‘Reject’ the transaction may result in you losing your ETH.
Step 5: There are several listings under number 100 that are still free to claim, you just have to pay for the gas. Note the <vacant> text in the listing. To claim, simply click the ‘TAKE’ button and you will be prompted to complete the transaction on MetaMask.