越南的OPEN BUS能砍价吗?

我在sinhcafe上看到的价格,为什么大多数攻略上看到的票价差太多啊?这个官方报价是可以砍价的吗?我看攻略上有人买的全程只有21刀,这上门要45刀,翻倍了都..

HA NOI – HUE – HOI AN – NHA TRANG – DA LAT – SAI GON: USD 45

HA NOI – HUE – HOI AN – NHA TRANG – SAI GON
42 USD

HA NOI – HUE – HOI AN – NHA TRANG – MUI NE – SAI GON
45 USD

HUE – HOI AN
9 USD

HOI AN – NHA TRANG (Sleeping bus)
15 USD

HUE – HOI AN – NHA TRANG – DA LAT – SAI GON (ONE WAY)
34 USD

HUE – HOI AN – NHA TRANG – MUI NE – SAI GON (ONE WAY)
34 USD

HUE – HOI AN – NHA TRANG – SAI GON ( Sleeping bus )
32 USD

HUE – HA NOI (ONE WAY)
14 USD

NHA TRANG – SAI GON
12 USD

NHA TRANG – SAI GON (sleeping bus)
14 USD

NHA TRANG – DA LAT
8 USD

DA LAT – SAI GON
9 USD

HOI AN – NHA TRANG – SAI GON ( Sleeping bus )
30 USD

HOI AN – NHATRANG – MUINE – SAI GON
32 USD

HOI AN – NHATRANG – MUINE – SAI GON ( Sleeping bus )
39 USD

HOI AN – NHA TRANG – DA LAT – SAI GON
32 USD

HOI AN – HUE – HANOI
24 USD

SAI GON – DA LAT – NHA TRANG – HOI AN – HUE – HA NOI
47 USD

SAI GON – DA LAT – NHA TRANG – HOI AN – HUE
34 USD