Vending Coin Mechanisms, metal. Minimum 25 cents. Some up to $1.25, some 3.00. Multiple available.
These sell for over $100 from vendor supplies. Some are like new (recently purchased).
You can repurpose a coin acceptor (the mechanism that validates coins) or a change adapter/machine (the unit that routes and dispenses coins) into
a wide variety of interactive, automated, or artistic projects.
Vending box metal padlock bolts also available, $30 ea. Sell for $55.