Question Building a PC with used parts ?

I asked this question at the wrong time. Even the used parts skyrocket because of the shortage.

In general is it worth build a build a gaming pc with only used parts like, 2080 ti, 9900k?
 
I asked this question at the wrong time. Even the used parts skyrocket because of the shortage.

In general is it worth build a build a gaming pc with only used parts like, 2080 ti, 9900k?

There's no "in general" answer to this question because since budget and needs and prices vary wildly, so do the relative risks and benefits of buying used parts.