I've got the same model from 1986 (a Goldstar Sound), it's a TST-55, the sticker has managed to stay in place after all these years. It was the first 'quality' electric guitar I bought. I can't be sure but I've got a figure of ?239.00 in my head as the price I paid at the time.
That guitar on ebay seems to have yo-yo'd around for a couple of months now.
TommyR