I assume the argument is that people will see it and strike "while the price is right". While $1000 is not cheap, it's also not exactly exorbitant when you consider the cost of creating your own logo or hiring someone to make it.
Which takes time, and time is money. If you find a logo you like here that you can just snap up, that may very well be worth a higher price than giving input into creating something you don't know if will come out the way you want it.
