cheapest I've seen blank 25gb disks in stock is $9.48
These are all under 25gb according to the forum... It would probably pay to be a bit wary.
EDIT - All the pirates movies look to be on the large side so you are probably ok
Pirates of the Caribbean:TheCurseoftheBlackPearl 45,488,139,747
Pirates of the Caribbean: Dead Man's Chest 42,818,592,246
Pirates of the Caribbean: At World's End 45,035,768,044
Chronos
Blue Planet (IMAX)
(J) Project PAPO (1080i59.94)
Happy Feet
(EU) National Lampoon's Christmas Vacation
TMNT
Planet Earth Disc 4 - 2 Episodes
Corpse Bride
Good Night, and Good Luck.
(EU) March of the Penguins
Training Day
Mad Max 2 (The Road Warrior)
The Omega Man
Twilight Zone: The Movie
Aeon Flux
Under Siege
(EU) Music and Lyrics
(J) Iblard Jikan (1080i59.94)
Syriana
Nature's Journey (1080i59.94)
Jay and Silent Bob Strike Back
Scooby-Doo
Swordfish
Fantastic Four
Superman II: The Richard Donner Cut
The Transporter
Gone in Sixty Seconds
Ultraviolet: PG-13 Theatrical Cut
The Punisher (2004)
Phone Booth
The Wild
House of Wax (2005)
Lethal Weapon
Crash: Director's Cut Edition (2005)
Saw
Lethal Weapon 2 (1080i master)
The Usual Suspects
Basic Instinct 2
RoboCop: Unrated
The Covenant
Planet of the Apes (2001)
Talladega Nights: The Ballad of Ricky Bobby(PS3)MPEG-2
The Warriors: Ultimate Director's Cut
Chain Reaction
First Blood
The League of Extraordinary Gentlemen
(EU) Hostel
Stealth
Eight Below
Bulletproof Monk
Kiss of the Dragon
S.W.A.T.
Transporter 2
Silent Hill
Dog Day Afternoon
Lara Croft: Tomb Raider
Commando
Entrapment
Blazing Saddles
The Great Raid: Unrated Director's Cut
Rocky
Kung Fu Hustle
Mission: Impossible
Dinosaur
Stir of Echoes
Blade Runner: Ultimate Collector's Edition Disc 1 - The Final Cut
Lord of War
Reservoir Dogs
Blade Runner: Ultimate Collector's Edition Disc 5 - Workprint
Species
U2: Rattle and Hum
Mission: Impossible II
Behind Enemy Lines (2001)
Into the Blue
Doctor Strange
The Omen (2006)
Tears of the Sun
Monster House
Speed
District B13
The Devil Wears Prada
Stargate: Extended Cut
Resident Evil: Apocalypse
Full Metal Jacket (1080i master)
xXx
Mission: Impossible III
Dragon Ball Z: Broly Double Feature
American Psycho: Uncut Version
Broken Arrow (1996)
Sleepy Hollow
Memento
Underworld: Evolution
Sky Captain and the World of Tomorrow
(EU) The Island (2005)
Ice Age: The Meltdown
Purple Rain
Saw III: Unrated Edition
(J) The Art of Disney (1080i59.94)
X-Men: The Last Stand
(EU) Kung Fu Hustle: Uncut
Planet Earth Disc 2 - 3 Episodes
Terminator 2: Judgment Day
The Italian Job (2003)
Reign of Fire
The Fifth Element
Blade Runner: Ultimate Collector's Edition Disc 3 - Seamless Branching
Reds Disc 1
Planet Earth Disc 1 - 3 Episodes
The Brothers Grimm
Rising Sun
Hitch
(HK) Infernal Affairs (1080p24)
The Phantom of the Opera (2004)
The Terminator
Reds Disc 2
Sahara (2005)
Planet Earth Disc 3 - 3 Episodes
The Fugitive (1080i master)
Enron: The Smartest Guys in the Room
(EU) Men of Honor
House of Flying Daggers
The Devil's Rejects: Unrated
Saw II: Unrated Edition
Open Season (2006)
Nine Inch Nails Live: Beside You in Time
Total Recall