I've seen '74s in red, tan, white, but never black. Sharp car and seems priced to sell at the $8,500 opening bid.
This seller is pretty prolific so I'd want a good inspection before bidding, but the price seems pretty fair if it's relatively clean in person. However, it appears to be a hatchback, which is a bit of an oddball.
Link to 1974 GTO, Factory Black on Black
2Z17B4W136076