What it means
A bit cheaper, please. 便宜 means cheap, 一点 softens the ask.
When to use it
Works in tourist markets. In malls and chain stores, prices are fixed and haggling isn't done.
Examples
pián便yi宜yì一diǎn点kě可yǐ以ma吗？
Could you make it a bit cheaper?
zài再pián便yi宜yì一diǎn点ba吧。
Come down a bit more.
pián便yi宜yì一diǎn点wǒ我jiù就mǎi买。
If it's cheaper, I'll buy it.
The full set of survival phrases for greetings, dining, shopping, and getting around, each with audio.