DO go to a recycling centre. Ask them to keep old keyboards for you; anything heavy, noisy, or interesting. Or, if they're not sure, just keep all of them. Tell them you'll come back in a week. Profit.
Other options include asking around in buildings with lots of old computers. Stuff like offices, university buildings (particularly sciencey ones, they tend to have very old equipment which sometimes bites the dust), that sort of thing. Most buldings have a room with stuff to do disposed of, you can get lucky that way.