Modchipcentral.com has wiikey2 yellow sticker chips for $19.99 + $5 shipping. They are based in Canada so shipping will take longer if your in the states. http://www.modchipcentral.com/store/wiikey-2-wiikey2-modchip-mod-chip-yellow-sticker-6-wires-w-free-triwing-phillips-screwdriver-works-with-all-consoles.html

With free shipping and shipping locations in the USA, I’m recommending http://foundmy.com for wiikey2 modchips. You can snag one now, shipped with tri-wing and philips screwdriver(needed to open your wii), for $35 shipped.

Of course, leave a comment if you can inform us of a better deal on single, non risky, quality transactions.