Gambling mechanics

[RAMsesist]

The odds are:
Rare: 10% (1/10)
Set: .05% (1/2,000)
Unique: .02% (1/5,000)
Magic: 89.93% (about 1/1.1)

So you get about 500 rares per unique.

Are you sure about this?
I think it should be 89,85%magic / 10%rare / 0,1%Set / 0,05%Unique