I know man.. I have the set. They were 250.00 usd when I got them, not sure how much now.
You did an excellent job making those colors pop with sharpies though.
I used to use sharpies when coloring comic book chars back in the day,
when I got into a band after highschool I started buying prismacolors because an artist friend recommended them.
Been hooked ever since. The smudge/rub on these things for shading/blending are fucking amazing.
If you're good, you can pretty much utilize that pop to the fullest too.