I found as a kid the cheap ones did nothing but frizz my hair more
this!!!!! i started straightening my hair around 10-12, every bday or xmas mum would buy me the crappiest straighteners like remingtons, big w brands, kmart brands and they all made my hair worse, frazzled it, made it dry and way more frizzy.

i finally bought myself a fabulous straightener after all these years . it's called a Cloud 9 - made by GHD but much better, has special plates that coat your hair with shine, and has temperature adjustment, where as the GHDs don't. buuut it did cost me $350 last year :/ - so yep very pricey! but it was totally worth every penny! - the amount of straighteners mum bought me, would of equaled that anyway.

good luck!