Hi Calgreg, Some collectors specialize in airmail stamps. I know a few people who like to collect them as I do. It's also nice that you have these grouped as one lot, which makes this auction interesting. As far as having 25 bids, it's easy to do. Anyone can bid in 1 credit increments, for instance I could bid 200 credits, then 201, 202, 203 and that would already be 4 bids. Anyway, nice auction!