There are some things that I cannot get in working order. The most
prominent example is an Apple AirPort card - I tried to buy it several
times, from different sellers and on several auction servers. All
refused to deliver it to me as it stopped working on a last test before
shipping.... (I no longer need it today as I have no WiFi router
compatible with the old "b" WiFi standard)
The second unfortunate thing is a working external keyboard for Palm
III devices. I have one but it is too used. I have tried to replace it
several times so now I have at least two incompatible ones (not
counting the non-working ones which I don' keep) but no working one.
The last attempt failed as the seller found that he is not able to
accept payments and was unable to resolve the problem.... So I have to
use the old one which has some damaged keys.
By the way, I am writing this on The Clie UX50 as it is somewhat easier
to use it than use of a full-size but faulty keyboard.