Flat Irons.com has a great selection and how to tutorials with styling tips. This is helpful when choosing the right flat iron. Flatirons.com offers professional flat irons and hair straighteners at great prices. Check it out, I loved it!
I love it because it has wig videos, showing wigs as they come (not styled for photos), that is very helpful since you know now what you're buying. That takes the guesswork out of finding the perfect wig.