I've sniped the following out of usershops, including the amount of MP each cost me:

Yellow Phanty Potion (500,000)
Gothic Huthiq Potion (500,000)
Red Phanty Potion (500,000)
Yellow Rusty Potion (500,000)
Red Phanty Potion (500,000)
Blue Phanty Potion (500,000)
Sponge Kronk Potion (500,000)
Green Phanty Potion (500,000)
Yellow Phanty Potion (100,000)
Ghost Poera Potion (499,666)
Green Poera Potion (500,000)
Green Oglue Potion (500,000)
Grey Oglue Potion (500,000)
Ice Oglue Potion (500,000)
Skater Huthiq Potion (500,000)
Witch Huthiq Potion (500,000)
Blue Gizmo Potion (500,000)
Red Rusty Potion (450,000)
Red Zoosh Potion (450,000)
Black Gizmo Potion (500,000)
Yellow Phanty Potion (500,000)
Green Phanty Potion (500,000)
Grey Oglue Potion (500,000)

Looking for more! It seems Phanty potions are the most common to find in the usershops!