GIBSON IV BASS bass guitars for sale in the USA

At least 20 ebay results for GIBSON IV BASS bass guitars
1987 Gibson IV Bass w/ Case for sale

1987 Gibson IV Bass w/ Case

Gibson 66 Thunderbird IV Used  w/ Hard case for sale

Gibson 66 Thunderbird IV Used w/ Hard case

Gibson 76 Thunderbird IV Used  w/ Hard case for sale

Gibson 76 Thunderbird IV Used w/ Hard case