So first determining the value of the effect: Overclocked. From these links you will see overclocked hats that are already priced.

http://backpack.tf/unusuals/337/Le_Party_Phantom

http://backpack.tf/unusuals/216/Rimmed_Raincatcher

http://backpack.tf/unusuals/338/Industrial_Festivizer

As you can see, its generally priced above searing plasma,stormy storm, vivid plasma cauldron bubbles and in 2/3 of these samples it is above eerie orbiting fire.

http://backpack.tf/unusuals/481/Stately_Steel_Toe

Now the actual price, so the lowest price (my suggestion) is the same/a bit higher than the highest prices of cauldron bubbles and searing plasma but the higher end of the price (my suggestion) is still lower than the higher end (of the price) for eerie orbiting fire.

There is only 1 Overclocked toe in the world so the only person that can sell it is me, here's the link.

http://www.tf2outpost.com/trade/11612607

Offers that are mentioned in the description are all around 1bud-30 keys+, depending on how much you price the items with a price range.