I am not going to worry about this being a hoax. The seller appears legit - he has 577 feedback and only 1 negative. He also has an Ebay store. I have bought a lot of stuff on Ebay and have never been burned, but have been disappointed a few times. Anyway, I also ordered one and am in the same boat, so I hope it works out
As far as this not being a good burner, I do not know. It seems to be able to do more than the DVD/CDRW combo that I was looking at - and is cheaper. Only problem that I have read about is that it may not burn DVD-RAM and may need a firmware upgrade to do DVD-R at 2x (that was for the MAC version though). I did see in a forum posting that the B version of this is PC specific since the A version was for Apple (but I think either can be used in a PC).
Another thing to note is that the Master and Slave settings are designated by the firmware and the drive would need to be flashed to change that. If you have a problem with the install, try putting it on as master first by itself, then try it as a slave using another drive as master. There is also a cable select version of firmware, so that would be another option to try. Once I get mine I will post my experiences. I have emailed Panasonic to see if I can get the latest firmware for both master and slave.
I have found firmware (including hacked firmware) at a popular firmware site, but I am not going to post the link since it is not specific to this *Exact* model - it is for the UJ-815 (not A or B). If it turns out that I need it to get it working right then I will post here.