How do you know this isn't an FBI cyber task for operation where they sell pirated software software on laptops on ebay. Then, after the package ships and it's opened and used the first time, the embedded SIM card sends a signal out and it's a whole new season of 'Bait car', except with laptops!
There is a distinct difference between the scenarios -- it is virtually always illegal to steal [from] a car, but buying an item from ebay is very unlikely to be illegal.
Generally, the buyer of a counterfeit is treated as a
victim of the crime -- having paid for a product believed to be genuine, he has been defrauded.
Knowingly possessing counterfeit is usually illegal (and necessarily follows from buying a known counterfeit), and many such laws include the nebulous situation where one 'should have known', but proving such knowledge in court tends to be difficult so buyers on a small scale are rarely prosecuted, though I would expect the copyright holder to easily obtain a court order for the counterfeit itself to be disposed of.
n.b. Exact laws and provisions vary by jurisdiction.
I certainly wouldn't trust or buy regularly available software that under-priced, but I consider it quite unlikely to be a sting of some sort, as the mere act of buying is not sufficient evidence to establish a crime.
As kamenges notes, it is possible that the whole thing is legitimate, if very unlikely imo. The first thing I would do if I were to obtain such a laptop would be to verify the actual authenticity and status of all licenses.
