The price level list method of inputting data is cumbersome, There are a couple of modifications that would make this feature easier to use for uploading large price file lists.
1) Enable a feature which allows for inputting multiple items exactly like the add multiple items interface which allows for pasting excel data
2) a find bar, the current method of scrolling through the item list is horrible. Locating individual items is a pain
3) Allow custom field data to be used as a tag or filter to bring up certain items with the same tag
4) the price level window should be a full screen window allowing for viewing more items
If you have over 1000 items in your list scrolling is almost absolutely worthless