Does that include material cost? Doesn't seem that bad to me.
$5lf to remove, install, prep and paint.
I don't care how many hours he has. If he had $150 in material/fuel/consumables then that's just about 2 days labor at $35/hour. Who knows how much of PITA it was to install. How many miters, trips to the saw, stuff to move around, etc.
Why didn't you offer to install the base?