private void removePlayerItems(Player p, ItemStack item, int amount, double pricePerItem){
    int remainder, nrOfStacks;
    int itemsSold = 0;
    double payToPlayer = 0.0;
    boolean playerHasItem = true;

    // Make a clone so we don't manipulate the origin ItemStack
    ItemStack itemClone = item.clone();

    // Get the max stack size of the item
    int maxStackSize = itemClone.getMaxStackSize​();

    // If the max stack size can't be determined, we assume 1 to be on the safe side
    if(maxStackSize > -1){

        // Check if player is trying to sell more than fits in a single ItemStack
        if(amount <= maxStackSize){
            itemClone.setAmount(amount);
        } else {
            remainder = amount % maxStackSize;
            nrOfStacks = (amount - remainder) / maxStackSize;

            itemClone.setAmount(maxStackSize);
        }
    } else {
        nrOfStacks = amount;
    }

    // Loop through the amount of ItemStacks
    for (int i = 0; i < nrOfStacks; i++){
        // Remove 1 ItemStack
        if(p.getInventory().containsAtLeast(itemClone, 1)) {
            p.getInventory().removeItem(itemClone);
            payToPlayer = payToPlayer + maxStackSize * pricePerItem;
            itemsSold = itemsSold + maxStackSize;
        } else {
            playerHasItem = false;
            break;
        }
    }

    // Make sure to sell the remaining amount as well
    if(playerHasItem && remainder != null){
        if(remainder > 0){
            itemClone.setAmount(remainder);
            if(p.getInventory().containsAtLeast(itemClone, 1)) {
                p.getInventory().removeItem(itemClone);
                payToPlayer = payToPlayer + remainder * pricePerItem;
                itemsSold = itemsSold + remainder;
            }
        }
    }

    if(itemsSold > 0){
        // Do economy here, something like:
        main.economy.depositPlayer(p, payToPlayer);

        p.sendMessage("Successfully sold "+itemsSold+" item(s)");
    } else {
        // Not a single item was sold so tell player he doesn't have item
    }
}