Okay, another answer. This one should incorporate your title a little better, but not your comment on my previous answer... sigh.
What's if all fore?
Dunno about the 'if' misspelling, but 'fore' is a warning to people about to get pegged by a ball.
Half a pence for my domain,
On a face I can be found,
The old golfers' habit of using coins to save their ball's location on the course.
Keep me and appear quite sane,
Green and growing on the ground,
Nobody wants to lose their balls as they play. Alternatively, this could refer to 'sane' being 'good golfer' and they keep their balls within the area of the course that is only composed of growing grass, and perhaps even make it to the 'green'. They're not taking 'insane' shots into sand traps or the woods or water.
Or in a basket with my friends,
The golf balls are carried around in baskets together.
A block of wood behind,
Where all of us had met our ends,
A block can refer to an area, so perhaps these golf balls are lost in the woods?
The verdict was unkind.
The aforementioned golf balls were lost in the woods and were never found, or the golfer gained points on the hole from not meeting par requirements.