How are buy box prices updated? Will they update even if I'm out of stock?
For SKUs that are in stock, you should see changes on Amazon reflected in as little as a minute to as long as 4 hours. When a product goes out of stock, the buy box will continue to update but there is a much longer potential lag. This is due to how Amazon's API works - updates about in-stock SKUs are easier to get and update on a frequent basis. Out of stock SKUs require us to jump through a few hoops, although we will update those every 6-8 hours.
If you are seeing a pattern or are concerned about a SKU never updating, please let us know. Send us the SKU and we'll investigate.