Go Daddy offers you to buy gift certificates, so that it can be sent to your friends.
Once you buy a gift certificate, a code will be emailed to your friend. This code can be redeemed by your friend for any purchase.
The risks of buying these gift certificates are,
Your gift code will be emailed only once to your friends email id.
If it is lost/email not received etc. it is very difficult to get it again.
There is a big proceedure for getting a refund.
If you are planning to sell something against a gift certificate, unless you know the other person, avoid accepting the same.