Background Reading: the first 8 pages (A through to I) of Chapter 4: Buying New: Perspectives 

Tips: 

-Honestly ask yourself if you really care about comfort, performance, reliability, longevity, warranty, etc.
-If you’re OK with a “dollar store equivalent” model, then no need to spend more.  Don’t let yourself be talked into spending more, needlessly.  Just find the cheapest thing and go for it, unapologetically. 
-If you do care about quality, but you can’t justify the budget for a new one, perhaps consider a used quality product instead.
-if your budget allows it, focus on what you really want, not on the price-tag, then just go for it.