When you buy a storage unit at StorageMart, you are presented with a form like the one below with the price without additional fees.

After receiving the invoice for the first month, you may be surprised by the Value Coverage Fee on the invoice that isn't mentioned online during your checkout. This is definitely one of the best examples of the "Hidden Cost" dark pattern.

Please, be respectful to your customers and include all fees during the initial steps of the checkout process.