crazy_dave: First off secondhand market actually doesn't have to mean no money or no help to the developers - read my posts please you are wrong in this. If anything a digital market place allows you to monetize the secondhand market. Secondly from someone whose title reads "75% off or bust" you have an odd way of supporting developers. :) Lastly, always helping the industry is not always the best thing - even for the industry. Secondhand markets have always existed. They are a right of the consumer. Simply making a product digital does not abrogate a consumer's rights. By your arguments we shouldn't have libraries and all used book stores should shutter their doors. They don't help publishers, writers, or movie makers either.
If it is okay to buy a game at 75% off a year after release to the point where you are not really actually helping the developers why, if Steam offered such a service, would that be worse than buying a game at 50% from a consumer 6 months after release where Steam gets a fraction of the money because they hosted the transaction (just as Amazon and Ebay get a fraction of a used item for sale on their websites)?

Pheace: I'm a bargain hunter, that's certainly true. But developers that make good games still get my preorder/early purchases. If I had more money, I'd do it for more games, but that option isn't always there.
Steam is a retailer, taking a cut from game trades doesn't help the developers unless they funnel that money to the developers as well (which would seem unlikely), so yes, buying a game at 75% off a year later is still better than getting it second hand from a deal between 2 consumers and a second hand retailer (Gamestop/Hypothetical Valve).
I don't agree with the 'We have a right to second hand sales market' mantra. It doesn't have a place in digital retailing, it just doesn't make sense. Call it outdated if you want. Just because something existed before in different areas doesn't mean it should exist in other/newer areas. Things change, so do markets.
You can already see the console shift in this regard. They're curbing second hand sales (to battle gamestop) with their game pass thing or whatever it's called.
Why wouldn't they put that money to developers? That can even be a precondition of allowing the dang trade from the publisher to Valve. The developer is getting the same amount of money regardless and are getting it earlier. This is especially true when Valve themselves is the publisher. :) And the publishers owning their own digital storefronts could be quite common soon ... so that point becomes moot as well.
Plus you are kidding yourself if you think buying from the 75% off sale a year later matters at all to or supports the publisher or especially the dev the latter who has likely already seen all the money they are going to get. Both by that time have already long moved on. Those late numbers are icing on the cake for them. They do like their icing though.
They care about your pre-orders and first 6-8 months of sales at full price. People selling used games can actually be an indirect boon to publishers/devs even nicer than a 75% off late sale. For instance, someone who has resold their game now has more money which they can buy another game from. And helped by the money from the resale if they want to buy the new just released game, that's much, much, much better for the dev/publisher, even if the publisher didn't see any money from that used game sale, than the gamer waiting for another 6 months for a sale because they can't afford the initial release price.
Just because some things are changing doesn't mean that everything has to or that other factors can't change with them or that all changes are good and shouldn't themselves be curbed. There are a lot of options for a digital secondhand market. Greenman gaming is one. This whole "Second-hand market doesn't help anyone" mantra is actually quite short-sighted.
I already addressed DRM-free products in my earlier posts to you. To recap: DRM-free presents a special problem because no definitive record of an actual transfer of the goods can be made. Hence with a DRM-free product, I believe that it is unreasonable to expect a business to allow the transfer of those goods. However, with a DRM product (like Steam), you have digitally managed access to the game. Hence you natively have controls that ensures access has indeed been transferred.