these are average walworld prices

I love Knex coaster sets, but I agree, these prices are not much less than Walmart (more actually if you figure in Tax/shipping. For instance, the Rippen Rocket 2 is $48.92 at Walmart.

If you can wait for the following weeks after Christmas you will find these heavily discounted at Walmart and Target, usually 50-75% of their Walmart original (not list) prices, I've seen their $50ish doaller Knex sets marked down to $15-20 in previous years' after Christmas clearances.

Its pretty amazing what some Knex Coaster Enthusiasts have done with massive Knex Coaster Builds:

Best of Volume 1 & 2:

We love K'Nex at our house, but $600? Who buys that set?

Costco has the Ferris Wheel, Corkscrew, and Viper sets together for $47.99, Shipping Included.

http://www.costco.com/K'Nex-Amusement-Park-Series-Bundle-Pack.product.11767476.html