First shaft on the left is a Uni Loc First Generation Z shaft weighs about 3.55oz and is 11.5mm selling for SOLD shipped and includes PayPal fees.
OB Pro 30 in shaft, 5/16x18 joint weighs about 4.25 oz and is 11.75mm selling for $120 shipped.
Predator 314-3, 5/16x18 joint, weighs about 3.9 oz...