The primary reason the company takes the deposits isn't to reserve your vehicle; instead, it's to provide supporting documentation when trying to get financing. Unfortunately, there have been several companies that have unsuccessfully tried this in the past. The reason is because of the type of vehicle they are trying to bring to market. It's a 3-wheeled 'enclosed' vehicle. The book is still being written on the safety requirements for this vehicle. I'm guessing they're also trying to get funding under the Advanced Technology Vehicles Manufacturing Loan Program, which is extremely difficult to achieve. I love the idea that I could start seeing these vehicles on the road; and I would even consider buying one of them after a safe period of time. Unfortunately, they most likely won't be able to get the vehicles to a consumer's garage due to the inability to secure financing, either from the government, or privately.
If I had a deposit with this company, I would immediately ask for a refund. Then, once the first vehicle lands on the showroom floor, give them a deposit if that is what they require. Otherwise, you may very well find yourself $500 poorer.