They are only $1 apiece through Best Electronics while it's $10 + $6 shipping for 6 of them from MyAtari (B&C Computervisions). Of course shipping through Best might kill the deal, so make sure to bundle it with other stuff to spread that shipping cost.
I am now able to complete an incomplete Rayman, although the total price is exceeding an already-complete Rayman. I just hate seeing stragglers.