Cheat me in the price and not in the goods.
More Portuguese Proverbs:
Before you marry consider what you do.Portuguese
A seat in the council is honour without profit.
Portuguese
A stout heart breaks ill fortune.
Portuguese
If you want good advice, consult an old man.
Portuguese
Your windmill dwindles into a nutcrack.
Portuguese
When thieves fall out, their knaveries come to light.
Portuguese