Speaking to the US market specifically, this was completely to be expected. It's literally happened for every one of their new product roll-outs (Elise, Exige, Evora, etc.). The few "I have to have it now..." pay a premium over MSRP (and in the Emira's case also waited 2+ years), only to have cars finally arrive and then sit because dealers thought they could still get premiums. Even BAT gave insight when almost every car put up by owners trying to make a quick profit essentially sold for less than what the current MSRP is and in many cases closer to the original MSRP which was roughly 9-10K lower or simply did not hit their unrealistic reserve price and didn't sell.
I am personally a huge Lotus fan and believer in their core philosophy. However, I would never pay a premium for any of their cars (Bought a new evora, loaded, ridiculously discounted after a year on the lot). The closest I would be willing to do is pay MSRP for a custom spec. ordered car. However, as of a few months ago, even that wasn't possible. You still had dealers trying to move new cars for essentially MSRP when they should have been doing this once they got CARB approval and had dozens of people walking away from ordered cars months ago. Now, people want to pay less than MSRP for new given some new cars have been on the lot for close to a year (Many arrived last December, but couldn't be released until CARB approval finally came months later and are still on the lot from cancelled orders, walk aways).
So yeah, New and used prices are down and will likely go lower. And if you want to add a little more salt to that wound, the new I4 cars that are now apparently arriving with owners not wanting them will only compound this. Just check the facebook groups where Dealer reps are actively posting about new arrivals and their availability (yet earlier this year they were telling people to get in line for an I4).
If dealers are smart, move cars even if at a discount to MSRP and get them on the road to build the brand. The reality, they would still make money as long as their discounted price is more than their cost, which although not published, is estimated to be between 9-10% less than MSRP. more cars on the road = more interest. More interest = more people coming in to consider. I'd rather have sold all my inventory at a discount than have that same inventory sit holding out for more and paying the flooring cost every month which also eats into the profit.