I actually wrote to this scammer awhile back, not because I thought it was likely to be real, but because I was trying to figure out how they were hoping to steal money with something advertised as free.
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If you email them about it, you'll get a shaggy dog story about how the piano isn't actually around here, because you see, they moved, but then they decided the piano should go back to Pittsburgh, but if you mail them some money, they'll mail you a piano. Or use a moving service, or whatever dumb excuse they're using today to try and steal your money.
They will also use texting, to make it seem more real, and even made a fake website to make the fake moving service look real, but the whole thing is fake. Don't fall for it. It's just the same old "Mail us money, and we'll mail you a car/boat/trailer/whatever" with a fresh coat of paint and a couple different details.
And hey, scammers: "Thou shalt not steal" -- Exodus 20:15