Title says it all, it's an "Oak Leaves" block
Imgur

 

I bid Oak Leave

 

I can grow those

 

10 Grass.

 

So far highest bid is 10 grass

 

10 grass and a stick

 

10 grass + a stick+ a half eaten cookie.

 

1 dia

 

1 Dia, any other bettors?

 

1 dia 10 grass

 

1 dia 15 grass

 

2dia

 

3 dia

 

4 dia

 

4
And what is the item Id?

 

4 diamonds highest bid so far, I'm not sure about the ID

 

5 dia

 

5 diamonds final bet?

 

5 diamonds and one grass block.

 

5 dia 2 grass