I have been asked this question so much, I thought I would post my opinion here.
"What if I can only purchase a few markers, which ones should I choose?"
Even if you can only buy 10 markers, you can do a lot with them if you pick the right colors.
One of the worst mistakes you can make when starting out is to think that you should purchase 3 coordinating shades at a time if you are limited to the amount you can start with.
If all I had was three reds, three browns and three blues, what could I really color? Not much.
But, if I had 1 each of yellow, orange, red, green, blue, purple, brown, gray, skin tone and then purchased a blender pen- I can color anything. Here's why. You can color over and over the area for a darker shade, color just a little for a lighter shade and pick up color on your blender pen and use that as a lightest shade. Now, you have 27 colors!
Don't make the mistake of thinking that you need tons of varied shades per color family to begin.It will be far more enjoyable to color with a variety and to be able to fill in as you go.
This tomato was colored with only 3 markers and a blender pen- YR09- orange, YR15 Yellow, YG97 Spanish Olive and a blender pen.
Please keep in mind, I didn't put much time into this coloring, LOL! Just wanted to do a quick FYI.