Hi Joe/tx, very nice of you to offer! To the best of my knowledge from watching online sales for the past few years, Alembic basses from 1975-1979 typically sell for roughly $6,000 in fair/good condition, up to roughly $9,000 in unusually good (or excellent) condition. Average is maybe somewhere around $7,500.
1975-1979 guitars seem to sell for around $1,000-1,500 less than basses on average, for whatever reason. Maybe just less of a demand for them.
Amazing that the prices have almost doubled in just the last 7-8 years. Guess I missed the boat on buying one back then!
Anyway, I'm specifically looking for the original "brown bass" body shape that was phased out in late 1977, e.g.:

No need to go to any trouble! But if you happen to know of one that you or someone might be interested in selling, I'd be happy to discuss.
Best,
Mike