Hi, I think 50 tbt is a good price.... and since we're in the ball park of criticism... I hope it's ok for me to chime in again.
If you look where the red lines are this is where it appears the joints are in your picture... pretty funky eh? But honestly? the body itself looks fine, rather the limbs look like you have drawn the larger bone in both the arms and legs, and then after the 'elbows' and 'knees' it kinda dwindles off into nothing. I would say you should try draw the arms and legs about twice as long as you currently are. It helps to stand and pose yourself, to understand where hands should land and that. Try focus heavily on understanding where joints are. Drawing joints is one thing that REALLY helps me.
ok here I tried to mark a view things that make the image look a little off, as well as trying to imagine what the pose could look like. On the face the marks are to show the eyes are just a bit far off, giving a very... and forgive my rudeness, dopey look. While there's no ears in your picture (this is fine, like... irl I've really small ears you'd rarely spot em from head on) I've just marked them so you understand where ears go, between ears and mouth.
The horizontal line to the left of your character is to show where the fingers should be ending, just above the knee. The vertical line on the right of both drawing is to show kinda the perspective. On your drawing, over the hip we seem to get a head on perspective, but then from the hip down it SEEMS like it switches to 3/4th perspective. while the hip can twist like this, it's quite unnatural, so try to stick to all one perspective I guess. Oh! I've also edited the arm on the viewers right to be 'correct' length wise. Don't take this too serious, a mere stretching leaves the hand way too long and strange looking. But it might help you imagine! I'm not a super artist or anything, so getting criticism like this is what helps me,, sorry for imposing that onto you ^^;
I would suggest if you want to get into art seriously, try look at guides, and if it's possible at all, try find a good teacher. We often don't see mistakes in our own work just because as we look at it our eyes adjust to not spot them. Don't be discouraged! you got potential! just try get rid of bad habits and you'll be a home run hitter in no time!