HELP FIGURING OUT WICH STRAIGHTENER TO BUY?

well i was gonna save up for the instyler but i read alot of reviews and many ppl said it sucked so i dont think i wanna buy it anymore. i need one that i can buy at either a walmart, walgreens, or sallys beauty supply, . . so any suggestions? id pay around $50-$100. i cany buy any online. oh btw do they sell CHI straighteners at any stores? or do you have to buy it online? any help would be greatly appreciated ^_^ thank you