Nothing, totally free. You can pay $1 for 2 weeks of "Featured Listing" but this is up to you, and just a way for us to (hopefully) meet some hosting costs.
What buyer/seller protection do I have?
None, all transactions are between individuals on the site, Scuba Buddies is just providing an avenue for selling unwanted items. We take no responsibility for any transactions. We STRONGLY recommend using the PayPal option for your transactions as this will cover you within PayPal's buyer and seller protection schemes.
I have a complaint, who do I contact?
The buyer/seller you organised the deal with, not Scuba Buddies. Unless it's about the site itself, then you can hassle firstname.lastname@example.org.
Address? I'm not giving you that!!!
That's fine, but please list your suburb, you can organise with your buyer to meet, or to deliver the items. in fact we recommend this approach.