995 does seem high. But ballbacks are usually pretty hot items when they do come up.
I don't think it was the precurser to the Starfield Cabriolet, other than some of the same design team probably worked on both designs. I think the Ballback and Turbot (580T pictured above) were attempts at space age teles in the '80s. The Starfiled designs were aimed at the retro, anti-metal mindset of the early '90s. Even though Ibanez was capable of building great traditional guitars, many people wouldn't touch them because of the metal association. So the Starfield offshoot was started by Hoshino USA in '91. It flopped just like all the other Ibanez offshoots. Starfields are great guitars though. I love my Altaire.
Here's a quote from Jim Donahue, who was with Ibanez through the '80s and 90s (580T "Talbot" is a typo, 580T "turbot" is correct - it was named after a flounder like fish for it's extremely flat profile)
"The 580 models, This was supposed to be the USA model, This is when H&S guitars were in Bensalem. The models the 580B (Ball Back) and 580T (talbot) came out. The bodies and necks were made in Japan and shipped to bensalme to be assembled with Dimarzio pickups. But no Catalog was printed so no one knew they exsisited, The Ball back had a wooden pickguard and the Talbot had a tele shape. maybe 5 month total of these and they were gone, When H&S moved to North Hollywood in 1990 they left all the 580 bodies in Bensalem and everyone in the checking and repair bought the 580T bodies so there are some strange versions of these around. Still I think there are some of these bodies left. This was mainly bad marketing, No Catalog and not such a great design that ended it. (H&S is Heartfield and Starfiled) Yes heartfield like Fender, StarField means Hoshino in Chinese Charicters and Heartfield is Fujigen, So H&S was a partnership bwtween Fuji and Hoshino is bensalme to make USA made guitars, they mover to North Holly wood in 1990, then Kurt Cobain came out and no one wanted custom guitars so they closed."
-Jim Donahue
-Fuze