Day by day, finding a ".com" domain name that is unique, short, and meaningful is very hard and even if you found one, it will not be cheaper for sure.
So most of the business makes the mistake of choosing the domain that has no meaning and unmemorable. If you want an example, go look at product names in Appsumo.com. You will be surprised to see some pretty dumb names they used for their products.
I sold 3 domains last couple of years, reading the domain research reports regularly, following some of the best people in the domain selling business. This is what I learned, you have so many options and one of the best alternatives is ".Co" and most undervalued from my point of view.
It is undervalued and regularly I see a lot of meaningful, short, and brandable names that never been bought. If you are a startup or any kind of business, unless you don't find the better name in ".com", try ".co" next time, because the endpoint is here, your names should stand out from the crowd.
Hope this tip helped you in some way.