I'm gonna posting an add soon in the classifieds section for an EPI Thunderbird Goth version, pretty great condition. New strings, Matching Epiphone case + Roto flats in case you want to switch.
Just need to take some pictures and it's up.
I've never tried a Gibson goth or blackbird but I really liked the sound of my bird. The "wings" being mahogany gives the bass a lot of sustain and clear (piano like when the strings/rounds are new) sound. The epi-pro models are great basses as well, especially if you are into 5 strings.
"...Though as a boy I had bowl-cut brilliance that could carve up any conundrum,but now dunno how that could possibly have been" Wild Beasts