I haven't bought any in a long time so I looked it up at
www.texasmustang.com and they sell it for 8.95 to 9.95 a can, so you can expect to do the entire interior for less than $100 for the vinyl dye, not a bad deal because as you recolor the interior it also covers scuffs and makes it all look new again. It is good for soft vinyl like dash pads and steering wheel centers as well as hard plastic like kick panels.
Just take your time, clean well and spray light coats and you will be amazed at how good it comes out. Spray from one end to the other, past the edge of the piece so you don't have wet spots from the spray start and keep the can the same distance away from the piece you are spraying. Let it dry 24 hours before handling or reassembling.