Just like cars, it is easy to be fooled by marketing terms. Many signs with the words new, closeout special, and original price are designed to show you, the customer, value. Whether that value is true or just perceived is another story.
Overall, be weary of exactly what is being offered. For example: A 2017 model club may be new in that it has not been hit, but the 2018 model is the actual new club most golfers want. This is especially important if you are shopping for another golfer.
That is also not to say that a 2017 model of a club is much different or even inferior to the 2018 model. We all know that the technology doesn’t change significantly, just the promises of better golf with newly coined phrases of technology.
Pro Tip: Used demo versions of clubs that are in good condition offer a great value. The clubs having been hit prior likely will not affect how they play in your bag.