i sell and buy items !

i am selling these items:
enchating table=1 diamond
1 spawner=7 diamonds (or 2 spawners for 13 diamonds,i have 2 spawners)
1 emerald=1 diamond

i am buying:
3 stacks of grass for 9 diamonds

 

an emerald is worth 2 dias

 

An Emerald costs 2 dias. That doesn't mean that it's worth 2 dias...

 

i sell it for 1 dia

 

o I'll buy

 

ummm ya it does ._.

 

2 stacks of grass for a spawner?