For starters i must say that since i am not a premier member of this forum i can not know if this method is already posted or not. So here it goes...
1) You have a weapon let's say D grade
2) You have an enchant scroll for D grade weapons
3) You make sure you DO NOT have anything else in your inventory but these mentioned on steps 1 & 2
4) You tell a friend to come with you somewhere with no people
5) You make a shop selling the enchant scroll (doesn't matter how much you sell it)
6) While you have your shop, you click on the scroll from your inventory and you keep it clicked to stay on the mouse pointer.
7) While you have it clicked, your friend buys the scroll from you

After he buys it you still have it on your mouse pointer and you try to enchant your weapon by droping it on the weapon icon.
Now we have 2 occasions that might occur,
First, you successfully enchant your weapon and your still has the scroll so you keep doing it over and over.
Secondly, your weapon brakes into crystals but you don't loose your enchant scroll which is important if your weapon is high-graded and so these scrolls are worth a fortune.
Hope you manage to do the trick and also hope for a premium account
