Amazon offers the Gymnic 80.01 Inflatable Rocking Rody Rider with Base for $74.65 with free shipping. (It comes in either Red or Yellow, chosen for you at random.) That's the lowest price we could find by $11, excluding the below mentions. The rocking base detaches so that the inflatable rider can be used for hopping and bouncing.

A close price: School Specialty via eBay and offer it for $75.97 with free shipping.