Might be useful for a) robots, b) high voltage/current applications, c) fun…
I’m afraid I don’t know where you could get any…much less, any for a reasonable price; but if anyone else does, feel free to speak up. Just something to consider…
You can get peltier coolers from the usual surplus places like [All Electronics
Of course, the selection changes from month to month](http://www.allelectronics.com/cgi-bin/category/775/Thermoelectric_Coolers.html)