Gibson 1980 guitar and bass catalog. Page 52. Details of the J-50 flat-top acoustic guitar.
The list price for the Gibson J-50 flat top was $759 (1/7/80).
$1695
$3900
$4250
$4395
$3659
$4200
$4985
$6300
$8995
$4995
$2800
$2199
$3995
$4000
£8999
£1950
£1595
AU $4000