Mystery Shop sells unappraised equipment of unknown quality. You need to pay gold to buy them. You can get equipment of higher than blue quality. Mystery Shop can be found at the Item Shop in all main cities.
Things sold in the Black Shop follows the rules below:
1. Equipment level ranges from character level+10;
2. Sale list updates 10 equipment every 30 minutes;
3. You can pay 8 gold to refresh the system instantly;
4. You have to pay items in gold.
Meanwhile, you can buy all equipment in the Mystery Shop in one go or repair all equipment at once.