Clearly your statement about not losing sleep is the truth given your description of the purchase. More importantly, you had no qualms about posting these details to the forum, where there have been a number of threads posted by people who have had equipment stolen from them.
Your first post left the suggestion that you didn't care if your gain was someone's total loss. The followups, for the most part, gave you a chance to explain your reasoning, even to the point of offering several alternative suggestions to the idea that the saw was stolen. Your most recent post confirms that you simply don't give a crap.
The concerns voiced here aren't the result of jealousy, they are either designed to inform you that you risk getting yourself into trouble, or to relay how much it sucks to have something stolen. Someone paid full price for that saw at one point, the question is whether they lost the whole thing, or willingly gave up most of it.
What I HOPE I would do under similar circumstances would be to <i> gamble</i> on a deal like that. Buy the saw, then check the SN with the local PD or whomever to make certain it has not been reported stolen. Post that here and you'll get congratulated on 2 counts...but post that you don't care how you get a good deal on a saw, as long as you get a deal, and you're not likely to make a whole lot of friends.