As an avid rollercoaster fan, and long standing season pass holder, I bought the Superman, The Ride nanocoaster online for $37.99 ( w/tax and delivery $46.60). It is a cheap sheet metal model, tiny in size (truly nano), with directions more vague than Ikea. The sheet metal models at Harbor Freight are bigger and better for $10.00. Do not waste your money, it is not worth the price.
It's worth $20.00 tops. Pic is shown with a toothpick for scale.