What do you think of a $300 office chair
Why would you spent that much money on an office chair?
I'm going to use it on my gaming chair on the PC, I think it's a good investment.
It's understandable to want to invest into something you'll use on a regular basis, but just you should only do so if you can comfortably afford it. Otherwise you may fail to meet other financial responsibilities.
I'm not going to listen to your opinion. I'm buying it.
If you can afford it then by all means go ahead. I hope you won't regret that decision later in life.