There's no specific answer we can give to this question, but most pro-level laptops these days can be found for around $4,000/£4,000 with top-spec features. Whether or not that's a good price depends on your own budget, lifestyle, and how much you can justify paying for one device.
However, if you work in the creative field and rely heavily on your laptop to do your job, and need to run necessary software such as Photoshop and Lightroom to make a living, then you could argue that pro-level laptops will pay for themselves in the levels of advanced work they let you create, and are a necessary investment.
That's just one way of looking at it, the alternative is to wait around for the next best model to replace the one you want, and get a worthwhile discount as the value lowers. You can also shop secondhand, which is a great way to save money and help the e-waste economy at the same time.