I've had 5 cels and a genga framed. First off 
$100 per cel is about what I've paid for most of 
mine. The frame shop I go to has a ton of mat 
colors to chose from (mats are the thick colored 
paper that sits on top of and behind the cel as 
needed)sitting out so you can do a test layout to 
get a idea of what the cel will look like. whan 
it comes to colors, LadyBrick can help you out, 
she helped me on one of mine and the came out 
quit nice. ^_^ Also the mats don't need to be one 
solid color. I have one cel that has a reflective 
mat for the background so it looks like it's 
glowing frome behind just like in the movie. I 
have another cel that the top mat looks like red 
swade leather. Also when themat is cut the color 
is only on the cery top of the mat. Most of the 
time the mat will be white where it is cut 
(a "white core") however you can get mats that are
 made of black paper ("black core")instead of 
white. Here's the cel with the reflective 
background and black core mats. (this one costed 
me $140 because it uses two mats, and the line 
cut into the top mat)