I picked up a SW40VE for a trade and bought a SW40E melonite treated slide with tritium sights for $75. Now I have the stainless slide that came with it and the melonite one.
As you can see, I painted the engravings red. I did the infamous sigma trigger mod and polished the sear and feed ramp. My cost ended up being $235 total. Next, I will polish the stainless slide like so many others have done.