Definitely a lot of plaids in inventory. Looks like the demand has been pretty much sated until they change the lights or something and the current Plaid owners want to sell their cars and get the new lights.
When I looked earlier at what was in inventory, out of the 47 in stock, 45 were Plaids. Some of those Plaids have build dates going back to last year. I counted 13 with 2021 build dates.
Inventory purchasing is pretty easy. Problem is they can go very quickly. If your SA is awake and not clueless, the can transfer an existing order to it. You will likely need to pay a shipping fee to get it transported to where you are. Best option though if a car that sells very quickly is buy it online (put an order) and work out the shipping details later. You will lose your original order fee if you do this.