I invested heavily in the 4e books (though I found some great sales on them at various bookstores that were going out of business). I like the play lite nature of 4e but have found myself going back to the OGL d20 time and time again. Think I'll visit some stores and do a Snoopy/vulure imitation, and wait for 4e to pass away. My son, who is starting his own campaign with a new group, I think would be better served using d20 rules. It's not the cost of the product that burns me.
I love a well made, nicely illustrated book. And I don't mind paying for it. But I do mind the marvel/dc comics lets fleece the consumer feel of switching it up every two years.