I'd say it's unlikely to sell above $50.
fwallet.net is available - Financial Wallet, Free Wallet, whatever.
nwallet.net is available - Net Wallet, New Wallet, Next Wallet etc.
Many similar names available as .co and other.
If I needed a name of these sorts, I'd probably go with webwallet.cash, which is available. Or thewebwallet.com, available as well.