I am wondering who is going to take this because anybody can create wallet on block chain as its free. So why will anybody pay you? Also you are not giving any btc in that wallet else it would have being more interesting and you would had many offers right away by now 
maybe his looking for wallets that have bitcoin cash and gold ...
You're probably right. It's likely the same guy as this thread. https://bitcointalk.org/index.php?topic=2562315.0