I think @OP is either a scammer or he's looking to claim an airdrop that the token can be worth higher than $350, I always feel suspicious when someone want to buy someone wallet when there's no difference between old and new wallet.
Or both
I read about an airdrop that pays around $2000, but only to wallets that used some shitcoin back in the days.
He never mention to use escrow so most provably he is just collecting those addresses which have thousands of dollars in transaction to use it for claiming on upcoming airdrops. This airdrops has been famous again since there are so many people who participate earning some good cash so maybe this is caught his interest to bait people about paying false $350 each wallet.
If he stated about using an escrow on this transaction maybe we people cannot call him a possible a scammer.