You (most) can search Marketplace for a while without an account, until Suckerberg finds out and boots you offline. Then just try again later or the next day sort of thing. You can't get contact info or message them, but just send the link to someone who does have it. Actually works great as I have to send the link to the GF and then it gives me time to think whether I really need it - and if she asks. Normally never does, but there is always that chance.