Toys"R"Us via eBay offers the Hot Wheels Ultimate Garage Playset, model no. CMP80, for $79.99 with free shipping. (Amazon has it for the same price.) That's the lowest total price we could find by $20. It features parking spaces for 36 cars, a chomping shark, tune-up shop, gas station, and connects to other Hot Wheels track sets.
Of note, Jet offers it to new customers for $64.99 with free shipping via coupon code "15BUCKSNOW".