I instantly report spam and delete the message once I don't know who the sender is. Moreover, if he offers me something unrealistically such as a promise to give a big amount of profits. The case in the OP is clear, it is scammer, at least if we consider 2 things.
1. How can someone risk his money to buy an empty wallet? It doesn't make sense. Once you see again something like this, just ignore it. Someone must do something realistically, moreover it is related to buying digital stuff like a crypto wallet.
2. If he is a real trader, he must be better to buy from an exchange. They just need to wait for the dip and buy at that time. Why he must do a complicated thing like that?
However, you are lucky that you realize it. You still hold your tokens, and the scammer got nothing.