One example of this from 2019 which has a list price of $7400 is the G Shock MRG-G2000GA. It is inspired by a traditional Japanese sword, made from recrystallized titanium and comes in a limited edition of only 300 pieces.
Note: Baselworld 2020 was cancelled due to the virus.
Expensive Casio G Shocks – Available Year Round
There are also a range of models in the thousands of dollars that are available all year round and are not limited in any way.
The series numbers usually starts with G Shock MR-G or MT-G. And, you can actually find some of the models easily available on Amazon.