If we create a new listing with the same SKU for the same ASIN, but list it with a different condition, (such as New to Used Like-New), then delete the original listing, will the inventory at the FBA warehouse automatically change to "used like-new" as well?
No, you can't do that. The new listing you create will have a different FNSKU and your products will be stranded. You need to have your inventory returned to you.
Hi there @Seller_W4LO6d4H7y0Lo,
Just wanted to drop by and confirm that the information provided by @Seller_4zBzdtgCyS9EI is correct. You should create a new listing with a new SKU and create a removal Order for your products in the incorrect condition. You can review the Remove inventory overview on how best to create a removal order. Thank you for your understanding.
-Glenn