If you want to increase sales in your internet shop you can take advantage of discount systems. For this purpose you have to use Advanced Discounts plugin.
Advanced Discounts allows create different type of discounts to registered users.
You can choose when apply discounts:
– apply discount for first order;
– apply discount if total orders more then;
– apply discount if user spent in your shop more money than;
– apply discount for specific order;
– apply discount for cyclic order (every N order).
Also you can chose fixed amount discounts or percentage based discounts.
Plugin has perfect clean and usefull design.