Okay although I was finding it amusing, and having fun, I will be more specific for the OP as to why I believe my pricing is accurate (AT THIS TIME) ^_^
Prices fluctuate all of the time. When these were first dropped they went for around 60-80 m many years ago. Of course currency of mils value fluctuates as well. Later when the supply dried up and everyone was happy and none were on the market, the price went soaring high 600m and up.
Fairly recent times...
1. Olcher had one for sale at 500m which sat around for quite a bit, with no takers
2. A seller who asks for my price checks sold 2 in the past month at 450m, and I have seen another sale at 400m.
Does not mean that I am correct, but its what I have seen
I hope that helps ^_^
-Lady Deca