Color is pretty much the main difference in price for different colored RoPs.
For instance, rare colors like Pink would go up to 850-1000 probably.
Green, and Purple about 750.
Then you have Gold which is about 500-600.
The other colors like Red and Blue also goes at least about 450.
Then you have Teal and White, which are probably the cheapest, and
yet they cost at least 400 tokens.
Since RoP is in high demand due to the better HP boost and a
drop in price for Emperium Auroras, people oftenly trade Emps for RoP,
hence setting the price for RoP at least about 350 and upwards.
However, at the end of the day, the final say falls on the Seller/Buyer itself.
If you're looking forward to buy one, you might end up getting a decent deal
if you're patient enough to wait.
I hope my explanation helped you. :)
