According to TCR they catalogue as "D" chips ($10-14) as Mark said. You would think they would be rated higher with a production figure of only 250 each.. but it seems there are not that many plane chip collectors. The other thing that hurts them is that plane collectors tend to favor bomber and fighter aircraft rather than purely historical ones. As Mark said, typical sales for D chips are around $7-10. I seem to remember from the times I have seen these come up for auction they tend to go in the high end of that range, about $10 each, but I have seen them go as high as $15 each.