That seven-story glass structure visible from I-69 at about 82nd Street isn't an indoor sky-diving center or a massive Venus flytrap greenhouse. It's not a satellite station to spy on Mars' dirt organisms or a giant display case for Funko Pops.

There have been a lot of theories during the tower's construction. What it actually is: A car vending machine.

The state's first Carvana opened at 9 a.m. Thursday at 8130 Summit Hill Drive on the north side, with the motto: "Because car buying shouldn't suck."

Carvana's process — buying, selling and financing cars — happens mostly online. Buyers shop more than 10,000 cars and can schedule to pick it up at the vending machine or have the car delivered to their house, possibly as soon as the next day.

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If they choose the vending machine, they'll meet a Carvana employee, who'll hand them an over-sized novelty coin to place into a slot. The action symbolically "vends" a car, which the customer can immediately drive away. (Here's more information about how, specifically, the vending machine works.)

The intention is to cut down on the time it takes to haggle with a salesperson and then go through a dealer's financing department. Each car is certified through Carvana's own inspection process, with no reported accidents or frame damage.

Buyers can try out the car for seven days to make sure they want it. Carvana offers a money-back guarantee, with some limitations.

The Carvana tower holds 26 cars and is open 9 a.m. to 7 p.m. Monday through Saturday. Other states with vending machines include Texas, Tennessee, Florida, North Carolina, Maryland, Arizona, Ohio and Pennsylvania.

Carvana's online delivery service has been available in Indianapolis since 2016, and the company is six years old.

Call IndyStar reporter Amy Bartner at 317-444-6752. Follow her on Facebook, Twitter, and Instagram.