Somewhere in the later 90s ESP had a "custom shop" in the USA. It was only for a year or so, and the guitars were all (mostly?) built by John Gaudesi. What it's worth is difficult to say, though those pictures make it look like the entire back of the guitar was sanded down to the bare wood.
I'd suggest playing the guitar, and if you think it's worth what the seller is asking then you should buy it.