The average online post sending costs 2 stamps. If you have 50 recipients to send to, you will need 100 stamps. The 100 stamps package e.g. costs 19€. ($19)
We also offer beautiful free card designs, which can be sent for free including recipient list monitoring and guest management (Limit: 100 sendings).
Generally the cost of your sending depends on the design and complexity of your sending multiplied by the number of recipients you wish to send to.