Q: Whenever I import a CSV file does it gets appended to the items I already have in SKU GRID or does it replace them?
A: It used to be the case, that if you imported a CSV file that it would not update existing items, it would just append to your current items... in which case, this was leading to duplicate entries if users did not purge items. Now, it has been changed so that if the same reprice_marketplace and reprice_sku exist on the CSV and in Sku Grid, then the entry in Sku Grid will just be updated with whatever changes you've made. Therefore, you no longer have to purge all of your items out of the grid when re-importing a file.