That sounds extremely reasonable. I would definitely pay that!
Don't forget, effort is maybe the most valuable thing of all, or should I say time. It all depends on how long it takes you to make those strips. I'm guessing they take many times as long as a single panal. But, with those estimates, I would commission you.
Well, here's a strip idea I had a while ago, inspired by my boyfriend and his two friends...
There's 3 guys, they can look like anyone really. I'll call them 1, 2 and 3.
1st panal: 1-Alright guys, its Xbox night! 2-Hell yeah (or something like that) *holds up Xbox controller* 3-Um, guys, we have a problem. The Xbox is broken. *he's holding an Xbox that you can see is broken somehow, maybe it has a sad face on it or something* We're going to have to find something else to do.
2nd panal: (3 guys are looking around thinking, maybe saying 'ummmm' and 'hmmm' or just '....'
3rd panal: (the same only their poses change)
4th panal: 3- Let's mend it. *holds up screwdriver* 1 and 2- Yeah.
Just because I find people's obsession with Xboxes vaguelly annoying. I swear if my brother's one broke this is what he'd do, either that or have a breakdown! He does nothing else.