Thread: How much do you spend buying a vehicle?

So I've never spent more than $4500 on buying a new (to me) vehicle before, everything has been 15+ years old but generally still in good nick.
But lately I've been contemplating buying something much newer as I can afford it, and why not have a bit of luxury or at least not 20 year old suspension and interiors.

I've heard that the general rule used to be spend the equivalent of you years salary, but have also heard 50% of your salary.
Also seen some 20/4/10 rule, or similar.

Not wanting to go into whether modern vehicles are better/more reliable, or if it's a good investment or not, just interested to hear if there is a general rule people use.