Dude. You should totally aim for more. 100k is nothing. o_o
Like. I sold things for 100k in early 2009. That's my terrible, terrible work from back then, plus that I'm pretty sure commissions around here were just overall less expensive.
Something around 500k sounds much better.
Also, on a random other note. You might try using pen for your traditional lineworks. ;o It helps a ton with making 'em look nice and clean, which is a pretty huge factor for sellability. Especially when it comes to lineart.