Bottomline: Sell your stuff for a currant or 2 more than the lowest price (instead of less). You won't be the first one bought, but you will be the second and if enough people do this, we can drive the auction prices back up.
I get a lot of Music blocks and end up throwing them out on auction. I've noticed a tendency of prices to be driven down by people offering a slightly lower price than the last.
This has the effect of driving the price down slowly over time.
People do this for natural reasons: They got their goods for no money and any amount of money earned by it is profit. By making their stuff the cheapest in the auction, it's guaranteed to sell first.
I take a different approach however and want to encourage others to do the same.
So take the pledge today to stop auction deflation!