Now i tell you how to do complete unique (which passes copyscape ) with this method.
1. There is a golden rule to pass copyscape, you should not have 3 consecutive words, it will be highlighted as plagiarized then otherwise it won't be obviously.
2. What you have to do is, make sentences in a way that it allows for unique thing in sentences and doesn't violate the above rule 1.
For Example : I purchased [product-name(1...n)] to lead [synonyms of "better"] life.
It is just an example(coz "better" doesn't have as many options like product name), see product name will be unique everytime so { I purchased [product-name] } is unique everytime as it satisfies rule 1 + {to lead [synonym of "better"] life} is also unique everytime.
So, Unique + Unique => Unique
So the result will look like this, just showing few only.
I purchased bike to lead better life
I purchased toys to lead better life
I purchased nothing to lead better life
They all are unique in eyes of copyscape.
You get the idea.
That's it.
This method is something very close to what i do with my niche (not eCommerce) that's why i could relate to it.
Hope it helps.