Transformers have managed to retain their appeal over the years, and really, why wouldn't they? The only thing more satisfying than watching the Transformers transform on television is making them transform in real life. Transformers action figures first hit the shelves back in 1984, so there's plenty of history and plenty of opportunity to 'transform' your bank account if you own any of the classic editions.
Transformers action figures sell at around $2,000 if you own the right ones, such as Blaster, Ultra Magnus, Fortress Maximus, Swoop, or Sludge in their original packaging. Pre-1987 Optimus Prime, still in the box, is probably the highest value Transformers action figure. It's not uncommon for these to sell for $12,000. Do you own a set, such as the Voltron Lion set? You could get thousands for it, too.