Scamming!

For people with less experience in L2 it may be worth to be careful about scams.

When you want to buy a certain item, like "Crystal D Grade", make sure the item you try to buy is a "Crystal D Grade", i.e. it has that exact description when you click on it once with the mouse. If it does not have that description, it is probably not a "Crystal D Grade" :)

Scamming is not against the rules and unfortunately the icons for many different game items are exactly or roughly the same and this leads to some major problems if you are not careful. The title of the shop is totally irrelevant.

With experience you get to recognize the scam, even from the title. Be very careful about Crystals and Shots, i.e. items you usually buy in large quantities and an error there can be really nasty.