--snip--
But of course it will not be possible to withdraw coins as private key will not be available.
Such a bad surprise when you already crack the password.
It's unlikely you could crack the password, since it'll be proof whoever share/sell that wallet.dat is liar/scammer. IMO claiming you're not 100% sure about hint/characteristic of the password is safer option.
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For those who say it's a scam, what's the benefit of the scammer exactly?
I wouldn't say he's scammer, unless he find critical vulnerability on Bitcoin Core to execute arbitrary script when you load the wallet. But obviously it's very unlikely. It would makes sense if people accuse him as troll who enjoy other people wasting their time/resource.