Well I just stumbled across this listing in the promoted ads. Since I'm the original owner of this pin, I guess I can chime in. I don't like to step on other people's For Sale ads tho...
https://pinside.com/pinball/forum/topic/my-1st-nib-met-led-pro-pinball-refinery-edition-22
I started a thread on this game when I purchased & ordered NIB from Pinball Refinery. I spent a small fortune at the time. The mod list in that thread better describes all the mods that I had done. I installed the TimeBandit Total Lightshow board that replicates the lightshow on a Prem/LE & it adds sounds for the add-on spinners. I can see that the Premium BG, topper, coffin toy, Donny Sparky, speaker panel art & snake body mod were added after I owned it. Not sure if my custom song code is still on there, but probably not.
It's one of the nicest MET Pros you will ever see, that's for sure. Great game & looks beautiful. Hope that helps! GLWS Jason