I found this Dell keypad (Model NL25-KP, PS/2 Connector) in my file cabinet the other day (I've been considering a tenkeyless board, but I do sometimes need tenkey) and it seems to be having a bit of trouble. All the buttons are working, but a couple of them work too well... about every 15th striking of the 1, 4 and 5 keys produces multiples (two or three numerals for every keystroke). With that being said, it could be just the PS/2 port, or some other factor. As it is, I don't have any use for it, but am willing to send it to whoever wants it for $10+shipping. You may want the keycaps or the ALPS (1 black, 20 yellow?) switches. See pictures and, as always, don't hesitate to ask questions.