I am making plans to buy a new mattress here soon.
Why are you thinking of buying a new mattress?
I need a new mattress
If you need a new mattress then it makes sense that you buy one. The old one has served its purpose so it's time to replace it.
I actually still like my old mattress. I probably should not have posted this question.
If you really need a new mattress then go ahead and buy one. Just know that they are generally expensive, so if your old one is still fine then you are better off rocking with that one for a while.