Magento Mass Product Actions

Get a set of effective product management actions, like assigning categories and updating prices in bulk, etc. Stop spending a lot of time on product management.
- Assign multiple products to and remove them from categories
- Incr...
See More ease/decrease prices in bulk in a few clicks
- Copy custom options, images and attribute values
- Quickly populate related products, up-sell & cross-sell blocks
- Delete products in bulk fast
- 'Update price' action.
Using 'Update price' action, you can decrease and increase price in bulk. The price can be changed both by a flat amount or by percentage. For example you would like to decrease price of 200 products by 10 dollars/euros/etc. Select the products, choose 'Update price' action, type -10 in the text field and click 'Submit'. That's it.

'Update Special Price' action.
It works the same way as 'Update price', only for special price.

'Modify Special Price Based on Price' action.
This one lets you create special prices based on regular prices. For example you can make special prices 20% less or 15 dollars/euros/etc less than regular prices.

'Update price based on cost' and 'Update special price based on cost' actions.
Extremely useful for drop shippers and other store owners, who get product feeds from suppliers and just add a certain margin to the product cost. Now it will take you just a few clicks to correct prices instead of 'just' a few hours or days.

Price rounding.
Very often prices can look not very nice after updates, e.g. you can get prices like 3.87, 8.74, etc. The module allows to automatically round the prices to .50, .99 or .00. So after the update prices will look properly - 5.99, 9.00, 4.50.

Website: amasty.com/mass-product-actions.html