Why are there so many unopened amps, ect for sale?


I've noticed a lot, lately, especially McIntosh, ads for new amplifiers, preamps, ect in boxes never opened by non-dealers, just "regular" people. Are people hesitant to buy these. I myself was looking at a new McIntosh MC352 amp from a private seller. He said it's new and the box has never been opened. I'm rather hesitant to buy it, because why would someone buy it, never open it, and then turn around and sell it? I'm just curious. If it is truly new, would McIntosh warranty it; I'm assuming not since it's not coming from a dealer even though the warranty cards are supposed to be inside the unopened box. I truly would like to buy this amp, but am hesitant, and I'm wondering if anyone else has wondered why there are so many unopened boxes of stereo equipment for sale by non-dealers. Usually when we buy equipment from this site we know it's used equipment, unless it's coming from a dealer. Just a curious question and wondering if anyone had feelings on this subject. Thanks.
btstrg
That's a good point to ask for the serial number and email the manufacturer and ask if it's valid.
In any case it's OK to grab a chance for a great discount for NIB product except if it's stolen as mentioned by Budrew. So I guess that the buyer has to ask for serial number first and than call manufacturer(that's what I always do) like a lemon-check.
I received a post card from McIntosh that my C42 would not be warranteed since it was not bought from a recognized dealer. I bought it from audiogon from a salesman that used it as a display model in dealers showrooms. They will not warrent it. So Mac is tough on that one. Make sure you get a good enough discount when you buy equipment that way, in case something goes wrong under the normal warrent years of service.
I have wondered about this myself. If a person bought something new from a dealer and did not open the box then could he not return the unit? Worst case I would think that he would only be out shipping costs.

I guess this isn't always true as I just reviewed an ad where the dumbass made an impulse buy that later on was shot down by his wife. He is now offering the X600 amps for sale at a $6k loss. I bet wifey is really pleased with him. Forcing the dealer to refund his money at gun point might have been a better option.