When is a sales lead considered dead?

Taking the time to qualify a lead is a lengthy process but a process that will benefit you greatly many times over. If a lead was once qualified then chances are they will always be a good sales prospect. The prospective client might not be an immediate sale but could be one that you could contact again in six months to a year when they are actively purchasing or in need of your product or service.

Just remember, there was a reason you put them on your prospect list.