If I was the retailer I'd pay return shipping and hand select the replacement to ensure my customer got what they paid for. Given the necessity of returning two firearms I'd throw in some good will freebies or a store credit/gift certificate. If the Enfields they're selling have major defects, they should've culled them, or provided better descriptions so that buyers know what to expect. Make the price reflect condition. In the Internet age, no retailer can afford to be perceived as being anything less than above board and 100% customer satisfaction oriented because every dissatisfied customer has a very large soapbox from which to trash you to heaven's delight.