No way he bought 10K wallet. I won't provide any link, but single fake wallet usually cost $10 to $999.
If a single fake wallet costs 0$ to make, what makes you think a phishing site won't sell thousands for a few bucks?
That's possible, although i've never seen fake wallet.dat sold at such low price on both this forum and various website from search engine. And personally i'd say
near $0 since they need to fill it with fake data either manually or using script.