These are the G4s I want in particular - note that I'd prefer to have the backcard along with the pony. I also won't pay anymore than four dollars total per pony with shipping, simply because I can get most of them for five dollars at the store. When it comes to playset exclusives and the like, I'm willing to pay a bit more.
Note that the G4 list has ponies which haven't been released yet for my own reference, and that I'm not going to pay inane prices for ponies I can get cheap in three months.
G4 - Brushables
Apple Bloom
Blossomforth
Cheerilee
Cupcake
Daisy Dreams
Dewdrop Dazzle
Lily Blossom
Lulu Luck
Lyra Heartstrings
Ploomette
Princess Cadence
Princess Celestia
Princess Luna
Rainbow Flash
Scootaloo
Shining Armor
Skywishes
Star Swirl
Sweetsong
Sweetie Belle
Sweetie Swirl
Zecora
G4 - Blind Bags
1x11 - Fizzy Pop
1x14 - Sweetie Blue
1x18 - Sweetie Swirl
2x7 - Feathermay
2x8 - Blossomforth
2x9 - Lulu Luck
2x10 - Star Swirl
2x11 - Tea Love
2x12 - Ribbon Heart
2x13 - Cheerilee
2x14 - Daisy Dreams
2x15 - Stardash
2x16 - Honeybelle
2x17 - Dewdrop Dazzle
2x18 - Rainbow Flash
2x19 - Pudding Pie
2x20 - Snowcatcher
2x21 - Twinkleshine
2x22 - Rarity (Glittery)
2x23 - Applejack (Glittery)
2x24 - Fluttershy (Glittery)
3x3 - Bitta Luck
3x4 - Rainbowshine
3x5 - Goldengrape
3x6 - Pinkie Pie (Glow-in-the-Dark)
3x8 - Golden Harvest
3x9 - Sprinkle Stripe
3x10 - Sea Swirl
3x12 - Twilight Sparkle (Glow-in-the-Dark)
3x14 - Apple Dazzle
3x15 - Lovestruck
3x16 - Berryshine
3x17 - Meadow Song
3x18 - Rarity (Glow-in-the-Dark)
3x21 - Cherry Berry
3x22 - Heartstrings
3x23 - Noteworthy
3x24 - Lucky Dreams
4x1 - Applejack (Crystal)
4x2 - Fluttershy (Crystal)
4x5 - Minuette (Crystal)
4x7 - Pinkie Pie (Crystal)
4x8 - Merry May (Crystal)
4x9 - Electric Sky (Crystal)
4x11 - Berry Green (Crystal)
4x12 - Rarity (Metallic)
4x13 - Twilight Sparkle (Crystal)
4x14 - Rarity (Crystal)
4x15 - Sassaflash (Crystal)
4x16 - Peachy Sweet (Crystal)
4x18 - Applejack (Metallic)
4x19 - Rainbow Dash (Crystal)
4x21 - Amethyst Star (Crystal)
4x22 - Twilight Velvet (Crystal)
4x23 - Shoeshine (Crystal)
4x24 - Pinkie Pie (Metallic)
5x2 - Princess Cadence
5x3 - Sunny Rays
5x4 - Junebug
5x5 - Breezie
5x6 - Island Rainbow
5x7 - Princess Luna
5x8 - Sapphire Shores
5x10 - Flippity Flop
5x13 - Trixie Lulamoon
5x14 - Diamond Rose
5x15 - Cinnamon Breeze
5x16 - Ploomette
5x17 - Golden Delicious
5x18 - Ribbon Wishes
5x19 - Princess Celestia
5x21 - Forsythia
5x22 - Flitterheart
5x23 - Rainbow Wishes
5x24 - Lyra Heartstrings
Miniature Collection - Gilda
Miniature Collection - Lotus
Miniature Collection - Princess Cadence
Miniature Collection - Shining Armor
Miniature Collection - Wonderbolt (Surprise)
Miniature Collection - Zecora
Rainbow Collection - Emerald Ray