Q: Can I add more than 1 supplier link for my item?
A: Yes, you can have multiple suppliers per item. All you have to do is create additional entries in Sku Grid for them. You can keep everything the same as the original item and the only thing that would change would be the supplier url and supplier variation (if applicable).
So the marketplace and marketplace id (item number/ASIN) would be the same. The only thing that needs to be different is the supplier URL.
When Sku Grid sees more than one supplier URL linked to the same marketplace & ASIN, then it will use the supplier that is in stock at the moment and has the lowest price.
Note: Your item would not be treated as out of stock until all of the suppliers linked to the same marketplace and ASIN are out of stock.