This was my first attempt at formal invitations. I think they turned out pretty cute, but I will do a few things differently on my next attempt (including the spelling of invitation). They were extremely time consuming so I would probably sell them or something similar for about $6, plus shipping (discounts offered for larger orders).
Bridal shower invites - I can't take all the credit for these. I made them with my cousin: Alayna Townsend. I'd charge about $4 each for something similar, plus shipping (discounts offered for larger orders).
Wedding invitations I did for my sister. I would charge $3/each for something similar - also with discounts for larger orders.
Baby shower invitations - $3/each, with discounts for larger orders