Pricing question...

[RunninMI]

I know there's a lot of questions that get posted on here about pricing and I apologize for posting another one, but I need some input and advice. I know I price my artwork way too low, but I am getting better about pricing my paintings and scratchboards. I've had an email inquiry for a pencil sketch of a Kirtland Warbler. I don't do many pencil drawings so I'm having a hard time coming up with a price for this. He said he would like it lifesize, so I'm thinking an 8x10 or 9x12. My problem is, things always take longer than I think they will. I usually only end up making about $10 an hour, but like I said, I am getting better, and have realized that its not fair to me or my work to under price it like I've been doing. On this particular piece, there would not be a background, just the bird and maybe a branch and leaf or two. And because I don't do many drawings, I don't know about the time frame, guessing 6-8 hours. Thinking off the top of my head $125, but I don't know if that's too much/ too little, again because its not my normal medium, I don't know how to price it. Appreciate feedback/ advice/ input on this...

Thank you!
Tracy