a new Edelbrock intake is about 5, and the carbs are around 100 a pop, then figure air cleaners, linkage and fuel rail at another hundy at least. so it'd be about 1K all in brand new if you pieced it together. kits are generally about 12~14
swap meet price: 600 all day (take anything over 4)
ebay: 800-ish? BIN with a 600 reserve (plus shipping)
bro deal: 500 and six pack of something decent
if that intake is oval port, increase the price substantially