There is a problem with not being able to see cars before deciding.Tesla will not ship a used vehicle to a delivery center, just to let a prospective buyer take a look.
They need to have a firm order, with deposit, prior to shipping.
In some states, where Tesla does not have right to sell, you need to pay for your new or used car fully prior to shipment.
Alternative is to learn where your car is located, and travel there to take a look. Even then, they will want you to make a firm comittment prior to preping the car for delivery.
I am not a tyre / tire kicker. I resent in having 12k tied up just to be able to get to see photos of 3 cars I might want to buy.
Combine that with being unable to talk to anyone who knows the product, and you are really swimming against the current just to look at what's on offer.
Sure, take a $100 (or $1000 if it makes any difference) as a kind of indication of serious intention to buy, but make it easier to actually see the cars. Yes, having some central locations where you can travel to is far better than nothing.