As far as the method I use to buy new it requires a bit of patience. If you have to have it now, get out your checkbook and pay. Otherwise, go to all the dealers both in-state and in the surrounding states and get an "Out the Door" price. This is how you compare apples to apples. Start a spreadsheet or log and document the numbers. Work with Spyders that are actually in stock. Call once each month and see if the price has changed. As I said, anxiousness costs money. I paid slightly too much for my 2018 Spyder because I wanted it and it was closer to home. It was still a great deal, but I could have save about $1200 more by travelling farther (750 miles) to get one. Shipping one in would have ate the savings, so I pulled the trigger. I bought a truck using this method and had several of the other dealers selling the exact same truck tell me "They can't sell it for that". Now that was a great deal. Things I found out while using this method: Taxes and out of state purchases. Make sure you account for taxes, either paid or not paid, and how your state handles them. I found out that Florida had some kind of deal where I had to pay taxes that wouldn't be recouped in my state. No good. Most out of state purchases don't take taxes. Service: Definitely something worth looking at. One dealer close to me said they wouldn't work on a Spyder that wasn't purchased at their store. If you purchase from farther away, except in the very rarest of dealerships, you can at very least expect to be put to the back of the line for service. That in itself is something that I'd strongly consider unless you're near one of those truly superior dealerships.
As an edit- Get your options at the time of purchase. Handlebars, backrests, wheels, all can be much cheaper at time of purchase. Often they are sold at cost, or lower cost with reduced labor to sweeten the deal. Take that into account.