MessageTo

controller.cs

    public class SampleController : Controller
    {
        public ActionResult SendMessage()
        {
            var model = new MessageModel {SellerHandle = "testHandle"};
            return View(model);
        }

        public ActionResult MessageTo(string sellerHandle)
        {
            ViewBag.SellerHandle = sellerHandle;
            return View();
        }
    }

MessageTo.cshtml

<h2>title</h2>

@ViewBag.SellerHandle

SendMessage.cshtml

<div>
      @Html.ActionLink(Model.SellerHandle, "MessageTo", new {sellerHandle = Model.SellerHandle})
</div>