I've heard alot of bad stuff about them, but my 72x has been working great since I got it about 10 months ago. It's so quiet. Truly, I wish I could see how many of them really died, and how many just got the wrong firmware update (heard bad things about failing to use the special amd version with an amd system). The only cd-rom i've ever had die in less than 4 years of use, was a 52x creative, and it died after like 2 months of my little brother playing Diablo 2. I thought that was pretty sad, I went shopping around and found out no local retailer besides Best-Buy carried them because of the high RMA rate. Those companies had Kenwood 72X drives on the shelf though. This is why I am skeptical of people who say the Kenwoods are junk. I'm not asking to be flamed, I'm just stating my opinion on the matter.
To answer the title, no, there doesn't seem to be alot of them laying around. 🙂