The minimum price for yellow salvage is 1 (lowest possible bid). The maximum price is 100,000 (dev seeded salvage price). In between those two points whatever a buyer and a seller agree to exchange IS the market price, by definition.
If you aren't willing to pay whatever the going rate of the minute is you have a few options: 1) Place a lower bid and walk away. A reasonable but low bid will fill, sometimes even a bid of 1 will work but those are rare for anything but common salvage. 2) Buy the crafted item that you needed the salvage for. It may be a better value to pay 500k for the crafted IO than 50K for yellow salvage plus crafting costs. 3) Beat up a few guys in AE. For 80 tickets you can pick whatever yellow salvage you want. 4) Use brainstorms to craft random salvage at a work table (1 for common, 5 for uncommon, 20 for rare). Brainstorms come in super packs and I think they drop if you have a certain day job power. 4) Just play the game and wait until you get the drop you want.