Hmmm. In time the expansions would depreciate in value too... this isn`t anything new. And its certainly not a detrimental testimonial concerning Ironclad and Stardock... you`re going to judge the quality of a product by whether or not it is cheaper than an older discounted product? Granted, sure, it may seem odd at some point in the future to see expansions selling for more than the original, but so what - at some point in the future, newer products invariably sell for more than their predecessors. They are after all newer.
Besides, the alternative is to artificially maintain the price of the original. I guffaw (for example) every time I walk into a retail store and see Warhammer: Mark Of Chaos sitting on the shelf - used even - for no less than 49.99. Regular is 59.99; that game is old. My curiosity fails to exceed my thrift, I`m afraid: it ought to be cheaper by now.