Timing Belt Pulley Replacement Cost Estimate

What parts do I need for my timing belt pulley replacement and how much do those parts cost?

Timing belt pulley: The timing belt pulley is the main component in the replacement. The pulley's role is to maintain the alignment of the timing belt while it revolves around the crankshaft and camshafts, ensuring everything remains synchronized. On its own, a timing belt pulley costs anywhere from $35 to $80. 
Timing belt: When replacing your timing belt pulley, your mechanic may determine that the entire timing belt needs replacement. A new timing belt can range in price from $15 to $400.
Crankshaft and camshaft seals: These seals are designed to prevent oil leaks from the crankshaft and camshaft. Replacing them during a timing belt pulley replacement while the engine is disassembled is recommended. Crankshaft seals generally cost $10 to $60, while camshaft seals are priced between $5 and $35.
Tensioner: Responsible for maintaining proper belt tension to prevent slippage and ensure smooth operation, the timing belt tensioner can potentially be replaced along with the timing belt pulley. Replacement tensioners typically cost $20 to $125.
Water pump: Part of the cooling system and driven by the timing belt, the water pump becomes accessible when the timing belt is removed. Though it isn’t mandatory, you can consider replacing the water pump at the same time as the timing belt pulley to avoid additional labor costs in the future. The average cost of a water pump is between $45 and $150.