Q: Why all my items are out of stock?
A: All items when first added to the grid are shown as "vendor" with no price/stock shown until Sku Grid has had a chance to scrape them the first time around if we do not already have that exact URL in our database (meaning someone else has it in their grid and we've scrapped it before).
Be sure you have configured your marketplace for repricing, for example, if your selling marketplace is Amazon, please note that none of your items will update on Amazon if you've not completed your amazon marketplace settings (Settings --> Marketplaces --> Amazon --> US) i.e. you'll need to connect your Amazon to sku grid in order for this to work.
You'd need to enter valid amazon keys and configure your marketplace settings so that Sku Grid can calculate what the price/stock should be.