Thank you for your question. Do you have Part Numbers for the prices you've listed, we do not recognize those prices. Each retailer has their own method of pricing these units based on the margins they need to get so it is almost impossible to tell what "kits" are in question based on the prices listed as one might be on sale, one retailer might have them priced differently, etc. Typically price differences boil down to the accessories included, panel finish, and panel quantity. It is all the same style product, just a matter of how much of what particular thing you are getting which should all be listed in the product descriptions. Thank you!