I just had a panoramic X-Ray, and it cost $91. I don't have dental either. I don't know what the small X-Ray's cost though. The panoramic X-Ray was cool though. I never had one done until this one.
Don't worry though, because the cost of any significant work will more than outweigh the cost of the X-Ray. My wisdom teeth extraction (4) cost $1657. My Root Canal cost like $950, and the crown that will be going on that tooth is gonna probably be over $500.