These planes are 1/72 Airfix kits that run between $7-10 locally. They are a bit under scaled for 28mm figures, but for airborne craft I think it looks better than 1/48 and also lets me get away with smaller bases.
First up is a Gloster Sea Gladiator for my British Union Fascists:
Next up is a Supermarine Spitfire Mk I:
|Spitfire Mk I|
Finally there is my Hawker Hurricane Mk IIc:
|Hurricane Mk IIc|
The bases were made from 1/16" brass rod and some 3" wooden disks from the local craft store that have been double stacked to 1/4" in height to help stabilize the rods. I was a bit worried about the planes being top heavy and tipping over easily during gaming, so about a dozen pennies have been glued to the top of each base (the older ones work better, as they are heavier). I can now get up to a 20-30 degree tilt and they'll still pop back to upright. The bases were finished with Liquitex resin sand texture gel and some real rock, then painted in what I call "British rock quarry", a style that I came up with for my Doctor Who figures. This is intended to allow it to blend into both rural and urban settings.
Overall I was very happy with how they came out. Now I just need to get some ground forces painted up so they have someone to strafe.