The best scam I have seen for this booted linux off a USB flash built into the "laptop" deep down and inside and they gave you a VNC session to a nearby beefy Windows XP running on dual cores and 4GB (these particular guys were caught after I pulled out the ethernet, but I would have paid them a grand in cash if they had the foresight to add a wifi card.) The laptop itself is probably some kind of cheap ARM processor with 128 megs. Others have been ancient laptops put into a brand new case and the Windows OS hexedited to oblivion to report larger resources (this is even trivial when the sellers are pretending to be Lenovo employees; they say it has no OS and they can boot the machine to BIOS, show you the resources it has and peripherals but until it fails to find and OS in the MBR; yyyyeah, you just been looking at a "demo"; the power button has been rigged to replay a video; press ALT-TAB and you will end up in Windows 98 Media Player.)

P.S. If you suspect a scam don't call them out on it. Just say you have no money and walk away. Most of these "criminals" are just unemployed laborers working for a local mafia anyway, no need to make the poor guy lose face.