You are not allowed to buy anything for someone else at DAZ.

A couple of suggestions:

Find someone local who can buy things online.  Give them money, and have them buy you a DAZ gift certificate.  (You will need to buy a Platinum Club membership and Hexagon, so it will be more than $2.)  Maybe a friend or a relative?  They don't have to know anything about Poser to buy you a gift certificate.

Become a DAZ broker.  They will pay you in money you can spend in their store.