You are SO SMART! Thank you for sharing this information with us.
This is a great example of how we can use this forum to share ideas and info so we all benefit!
More on this topic:
The following SQL will round the Sell_Price up to the next even $0.50 or $1.00 increment. For example, an item with a Sell_Price of $0.34 becomes $0.50 and an item with a Sell_Price of $21.99 becomes $22.00
Again, please run the Backup Utility BEFORE you run any SQL statements that modify data.
Update Inventory set Sell_Price = ROUND((Sell_Price)/ .5,0)* .5
(This works with all versions through at least 5.0.0.3)