There are two types of possible outcomes to this situation:
1) Outcomes where you get busted - you may lose the laptops, and possibly even pay fines and/or do jailtime.
2) Outcomes where you do not get busted - you keep the laptops, but have to live with the knowledge that you may have committed a crime... always looking behind you for tails, and getting tense when a cop car drives by.
If you can live with the knowledge that you are guilty of a crime, and get caught, you can plead ignorance, and maybe nothing will happen to you.
If you can't (and I personally can't) live with the guilty conscience and the possible risk of being accused of a crime, turn the laptops in. Whatever happens, you will have a clean conscience, at the very least.