Items on that online shop...,

[Silverobama]

I recommend an online shop (selling organic food) to my friend. I said:

Items on that online shop are high quality, but they sell cheaper only if you buy them wholesale.

The intended meaning is "The things on that shop are organic and healthy and they will be cheaper only if the customers buy the things more each time". For example, organic blueberry juice for one package is 40 yuan, but if customers buy two packages, it's 30 yuan for each pack. Other things are almost the like this.

Please help me with a natural version of the italic sentence.

 

[tedmc]

Items sold by the online shop are of high quality, which are cheap only with bulk purchase.

 

[emsr2d2]

I recommended an online organic food shop (selling organic food) to my friend. I said:

See above. It's more natural to use the type of food it sells before the word "shop".

Items on that online shop are high quality, but they sell cheaper only if you buy them wholesale.

That online shop sells high quality organic food but you only get a real discount if you buy in bulk.

The intended meaning is "The things on in/from that shop are organic and healthy and but they will be are cheaper only if the customers buy the things more in bulk each time".

Reading on, it's clear you get a discount for buying two instead of one. That's not buying in bulk or wholesale. That's just buying more than one!

For example, one package of organic blueberry juice for one package is 40 yuan, but if customers buy two packages, it's 30 yuan for each pack two cost 60 yuan. Other things price structures are almost the like this similar.

See above.