Perhaps, but as a buyer buying an experimental certain scam, say he provides the most convincing scpheel ever, or you're just plain dumb (sorry many are here, so I can't rule that out) and you get home to discover your mining unit doesn't work because it's not a miner. What recourse do you have when you head back and discover your seller has vanished and no one there has heard of him, along with your cash??

Do not pay anonymous entities in anonymous currencies cash or BTC for unproven products, capiche?