Title says it.
I've got a job that requires a fair amount of data processing, so I need a numpad to go with my 660. I'm not overly picky. No linear switches, prefer clears to match my keyboard, but any tactile or clicky switch will do for a good price.
Looking to spend less than 40.
If you've got something special, give me a shout. Might be interested in a GON or aluminum cased numpad if it catches my fancy.