Fear of theft

Someone is offering me a CD with a collection of software (like the Treasure of Wisdom project, the Torah CD) for sale at a price of 1500 NIS per unit if you buy three. The price doesn’t sound logical to me and there’s probably something dirty here. He explains in a half-hearted manner that he’s just a messenger and that this is an institution that bought licenses and doesn’t need them all, take it or leave it. I think it might be stolen in some way. But of course I’d be very happy to buy it because it’s a real bargain. Am I allowed to buy it? Should I insist that he come back with explanations and if they’re not convincing or verified, then give up?