Something that many people have been complaining about is the current prices of the current top tier decks (mainly Dino Rabbit and Wind-Ups) on the secondary market.  In this post I'm going to compare the current decks to Tengu Plants from last format and Tele DAD.  I'd also compare it to DAD Return but I can't find accurate card prices for back then.  Commons/Rares will be defaulted to $.50 unless they where hard to get ones such as Royal Oppression, Lonefire Blossom, Phoenix Wing Wind Blast, etc.

TeleDAD (decklist taken from YCS Houston 2009)

Monsters:
2x Dark Armed Dragon: $200.00
1x Caius the Shadow Monarch: $5.00
1x Elemental Hero Stratos: $6.00
1x Dark Grepher: $7.00
1x Breaker the Magical Warrior: $.50
2x Destiny Hero-Diamond Dude: $.50
1x Mystic Tomato: $.50
2x Krebons $.50
1x Sangan $.50
3x Destiny Hero-Malicious: $30.00
1x Necro Gardna: $8.00
1x Plaguespreader Zombie $40.00
1x Spirit Reaper $.50
Total:  $560

Spells:
3x Allure of Darkness: $35.00
1x Brain Control $.50
3x Destiny Draw $40.00
1x Emergency Teleport $30.00
1x Heavy Storm $.50
1x Monster Reborn $.50
1x Mystical Space Typhoon $.50
2x Reinforcement of the Army $.50
Total: $258

Traps:
1x Crush Card Virus: $250
2x Phoenix Wing Wind Blast: $8.00
2x Royal Oppression: $5.00
3x Solemn Judgment: $40.00
1x Trap Dustshoot: $.50
Total: $396.50

Extra Deck
1x Black Rose Dragon: $8.00
2x Colossal Fighter: $2.00
2x Goyo Guardian: $20.00
1x Magical Android: $5.00
1x Psychic Lifetrancer: $.50
2x Red Dragon Archfiend: $4.00
3x Stardust Dragon: $10.00
3x Thought Ruler Archfiend: $10.00
Total: $125.50

Side Deck
1x Compulsory Evacuation Device: $.50
2x Legendary Jujitsu Master $2.00
3x Light-Imprisoning Mirror $.50
1x Lightning Vortex $.50
1x Mirror Force $30.00
1x Mobius the Frost Monarch $.50
1x Raiza the Storm Monarch $20.00
1x Royal Decree $10.00
1x Snipe Hunter $.50
1x Threatening Roar: $.50
1x Thunder King Rai-Oh: $10.00
1x Torrential Tribute $.50
Total: $78.50

Total for the entire deck: $1,293.00

That's assuming you went lowest rarity on each card.  You could have gone holo Stratos, Diamond Dudes, Sangan, Spirit Reaper, Phoenix Wing Wind Blasts, Brain Control, Heavy Storm, Monster Reborn, Mystical Space Typhoon, Trap Dustshoot, Mobius, Lightning Vortex, Legendary Jujitsu Master, Mobius, Snipe Hunter, THreatening Roar, and Torrential Tribute increasing the price even more, especially if you went CP for certain cards.