Even this is over-priced. The very same adapter as in the auction is 1.60 Eur in a
German electronics shop.
The only obstacle is that they have a minimum order value of 10 Eur and probably only ship to Germany. But if I buy two such adapters, a 3.5" IDE cable and a CD-ROM drive, I can add the CD-ROM to my 2.5" HDD for less than any of the above.
Bye,
Thomas