If you are after a wok, here is a decent Lodge brand wok deal.
Why cast iron?
Cast iron generally will last a long time with proper seasoning.
Good to be used for cooking that requires a heat retention.
Read about cast iron vs carbon steel here
How to season?
Use flaxseed oil, and follow instructions https://www.youtube.com/watch?v=PDTCgxvmShc
(Credit to garethds)
Cost
Price at the time of posting is $89.91
According camel, this is one of the lowest price in the past 12 months.
I second these lodge cast iron products. Works very well with my style of cooking.