I don't think these are 'teaser' prices. They seem comparable to paperback prices.
I've re-installed the kindle app to my iPad, and wondering whether it's worth learning how to strip the drm. Being a bit of a Luddite, I think it's probably a step too far.
Looking far into the future, when my Sony fails (going strong for 2 years I think, and it feels like it has many more left) maybe kindle will be the way to go. Just bite the bullet and accept I'm only renting the books, buying only those that are priced accordingly.