As @mllcb42 said, nobody is buying from inventory. You’re only likely to see this type of discount on an ordered unit, and plus, it’s fun. You can spec the car exactly how you want it.
Seems like @AutoCompanion is your best bet. Here’s a link to their Marketplace thread:
There’s a thread in “ask the hackers” about some poor guy who walked in to buy a Rubi, and paid way more than he/she should have. Trust us, if you’re unsure, pay the $500 or whatever and use the broker, it’s cheap insurance and you won’t have any surprises. You can get affiliate through Tread Lightly or similar for like $100. Your broker can help you here. Your employer may also offer affiliate if you work for a big company.