2 questions :D

[Ghost]

what is the best server in fact of commerce (to buy low price crystals and others)
after level 50 the game turn in a farm fest or something?
first 50 levels i've maked easily now i've some problem especially in the valley of kings >.<

[tetron]

probably try the older servers since they should have gathered enough of the said crystals to be sold cheaper.

Although since most or all the crystals are now set at a fixed price, I don't think any of the servers will go ridiculously low. :0

[Extreme]

After level 50, it gets tougher to level. It would be too easy if you can breeze through leveling all the way to level 120. It'll get even harder in your late 90's. :(

[sayw]

my 2 cents
=treasure map(dont buy market buy at wandering)
=farming howard and goncourt