In most cases, when faced with that decision, they'll pay the life
If you just have to play Ardoz because you're a hipster, use these: Warstorm Surge, Terror of the Peaks, Purphoros, Bronze-Blooded, Chandra, Flamecaller, Determined Iteration
Simply get them to the Graveyard to later recover with Incarnate, Obliterate, or Dark Factory of Mass Production
You can easily get two-for-one value here
We assign each sale to a Card, toss the junk, and record the grade of each sale
Afterburner Expert Auntie Ool, Cursewretch Boartusk Liege Boggart Ram-Gang Boom Scholar Feral Animist Goblin Anarchomancer Ground Pounder Grumgully, the Generous Hungry Spriggan Ignoble Hierarch Joyride Rigger Jund Hackblade Mudbrawler Raiders Ol' Buzzbark Owlbear Shepherd Redshift, Rocketeer Chief Rulik Mons, Warren Chief Scarwood Goblins Scuzzback Marauders Scuzzback Scrapper Shattergang Brothers Slimefoot and Squee Steamflogger Service Rep Swirling Spriggan Tattermunge Duo Tattermunge Maniac Tattermunge Witch The Space Family Goblinson Vexing Shusher Wort, the Raidmother Zhur-Taa Goblin