There's many things you have to consider when choosing a blow dryer. Watts are important, the higher the wattage, the more powerful the heat and air flow will be. A blow dryer with adjustments like a variable speed and heat control is always a good buy. Weight is also important, you don't want your wrist and hands hurting before even able to style your hair. Hair dryers can range from $20.00 to $150.00, but you can surely buy something in between and get a dryer with good features.
This is what I bought a few months ago, Infiniti Professional Tourmaline Ionic Styler Hair Dryer by Conair
It has 1875 watts, ionic technology to reduce frizz and provides manageability. Tourmaline Ceramic technology helps smooth the cuticle layer, creating silky, shiny hair. Has three heat and two speed settings and it also includes a diffuser for curly and wavy styles, and a concentrator for pinpoint styling. Oh, and it has a retractable cord, so, no more tangled cords !!!
I bought mine at Bed, Bath, and Beyond for $34.99+tax.