parabellum, I think the RAN, Brazilian, Chillean and Argentinian, amongst others, might object to your description
The short answer is yes, and they are often refurbished to customer requirements too. The MOD UK has a disposal sales organisation that offers up all manner of surplus, much not surplus, for sale. I know that the landing craft from Fearless or Intrepid were sold to the Egyptians for instance.
Of course many are not bought.