Is each of these attributes the same price in all products? Or do you want to alter all of them in exactly the same way (%, $ change, ...)?
Try this after backing up your database:
Code:
UPDATE products_attributes SET options_values_price = ROUND(options_values_price * 1.5)
WHERE options_values_id = 113;
Cut & paste in Tools > Install SQL Patches, changing the options_values_id as appropriate and the calculation to whatever you need. MySQL has specific syntax for calculations, so you need to be clear on how you want to change the prices.
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