You cant find invoice pricing on Lotuses anywhere online. When purchasing a vehicle like the Lotus, exclusivity is the name of the game. No one really pays too much for a Lotus, however, dont expect to steal one or negotiate from invoice. This is taboo --Ever find invoice pricing on Ferrari or Aston Martin or any other low volume manufactures? Ariel atom invoice?
Dealers are motivated to sell, and any one would be more than happy to entertain your offer. Be sure to compare service, reputation, and condition over price. Sometimes the best deal is a combination not just the bottom line.(Not a Chevy)
fwiw Ferrari (especially used) prices have taken a bit of a dive lately:
599/430 Prices Crashing - FerrariChat.com