From experience don't redirect. Have a landing page which explains that you are out of stock or if the itemis discontinued.
This is quite easy to do, but does take a bit of legwork first.
First create new expanded view product tempates which do not have the buy button include and name them the same as the original but with a generic name at the start. For instance if you have tmp_product.html and tmp_product1.html you could have tmp_tmp_product.html and tmp_tmp_product1.html.
Then in shopexd locate the GetTemplate sub. Directly before the End Sub add in:
if tmpRS("hide")<>False then
template="tmp_" & template
end if
This then causes the product to use your new template of the item is hidden.
Works well and is fairly easy to do.
Hope this helps everyone.
Steve
Sex toys from a UK sex shop including vibrators and dildos.