Our site shows stock availability-this chages to reda with DICONTINUED. The add to cart tab turns grey & does not function-it also has text detailing th eproduct is discontinued & to see alternatives below. Works for us, killing a page that used to generate good traffic is missing the opportunity to sell somthing else. Walk into any high street shop & see how a salesman works! I find redirects MORE annoying, the SERP's may detail one item so i click the link to be shown what appears to be the wrong item.