Copics are awesome, but they are not the sort of medium you just jump into. They take a lot of practice, and like some other people have said, paper makes a big difference. So does the pen you use for inking if you want want to color over or around lineart. Many pens that seem okay at first actually use ink that will flat out dissolve when used with alcohol based ink. So that's something to watch out for.
(Copic also sells inking pens that are the best thing going, IMO. )

There's also another brand of markers that's a bit harder to find, but generally less pricey, called Neopiko. It's not quite as rich in color as Copics, but for most purposes they're interchangable. They also come in different sets, so that can be useful if you want round out a small Copic set with some other colors.  (I use them a lot.)

Good luck on the bargain hunting! (The one thing these markers all have in common is the price, lol!)