Why would anybody want this
No one should buy this as the seller would always have access to your bitcoin as long as he keeps the private key.
No one is going to buy an address from anyone. This guy could just take the bitcoins out of it because he has the private key.
Do not trust this guy, he will probably just steal your bitcoins once you deposit them.
Someone would want to buy it because of the 'air drop' of clams' that was likely sent to it. The value of the clams sent to the address would be much less then .02 so there is little point to buying it - it would make more sense to buy it on an exhcnage.