The most recent an older drawing I've been charging 500K for them ,but (I hope this doesn't sound concieted) I think I might have been under-pricing them a little. How much should I be charging?

seeing as I love your style, I'd definitely say you're underpricing.

at least go for a mil and see what happens? C: from what I've noticed from being back for four days, the art market in subeta's greaaaaat, so you can probably get away with more than that.

I think 500k is reasonable for them, unless you are spending upwards of 2 hours for each one. o:

To be honest I think 500k probably a reasonable price for them. Although I think you could probably get a bit more :P

500k sounds reasonable actually, although if you added things like shading it could easily be upped to 750k.