Depending on the effect I will pay anywhere from:
Tier 1: 8m-10m
Tier 2: 4m-6m
Tier 3: 2m-3m
For Vintages:
Plain Vintage: 2.5m
Vintage + Rare: Extra 3m to the tier prices.
Painted + Rare: Extra 1.5m to the tier prices.
Painted Vintage: 4m
Painted Vintage + Rare: Extra 5m to the tier prices.
I will add more if it has other stats, just post it here or find me in game if you want me to price it.