Just ask
Most people never ask. One polite question, "Is that your best price?", is the whole move.
When it works
Anywhere a person can decide the price: independent shops, markets, big purchases, anything second-hand.
What to say
“Is that your best price?”
The mistake to avoid
Apologising for asking, or asking in a way that sounds like a complaint.
Practise it
Try this move on today's made-up shopkeeper in Bargle. Two minutes, free.
Play today's haggle