Here are a couple websites.... I think the coupons work for a couple more days!

http://www.creativekidstuff.com/p/50976/magna-tiles-clear-colors-100-piece-building-set
Enter coupon code gift25 for 25% off (free shipping)

http://www.sensationalbeginnings.com/magna-tiles-clear-colors-100-piece-building-set.html
Coupon code play25 for 25% off (free shipping)

I ordered one set from each website! This is the cheapest I've ever seen them go.