What does "不等“ add in 从A到B不等? So, I just learned this grammar.  For example, I know that we can say 

这个商店的价格从五十元到五千元不等。  

But, I thought I could also say 

这个商店的价格从五十元到五千元。 

What does 不等 add to the sentence? Does it slightly change the meaning? Does it make it more colloquial?
I would say the meaning is the same.

'从 ... 到 ...' is a phrase to describe a range, while '不等' means 'diverging'. Putting '不等' at the end will to some extent emphasize the meaning of 'diverging within a range' and you can take it as an echo for the phrase which makes the sentence more complete and sounds better.