It looks to be early 90's. The "Custom" designation from back then referred to the guitar being neck-through-body, not necessarily custom ordered. Features look to be fairly typical for the time with the "scult" cutaway for the lower horn and what appears to be the ESP's version of the Floyd (I can never remember the name when I go to type about it). Here's some advice; don't lose the trem bar, they're fairly difficult to come across.
Saddly, there's nothing extremely "special" about the guitar, in terms of features or construction. Probably maple-neck through with alder wings. It looks like it's in pretty reasonable condition, and if you love it, that's all that really matters.
On the market (which is where these guitars usually show up after someone asks about them on a forum), I'd expect to see it go in the $8-900 range. Possibly lower, possibly higher depending on where you're trying to move it and how long you're willing to sit.