These Baby Shower invitations have been made in a onesie shape with personalised wording. I can make between 10 to 30 of them. Simple ones are $3 each. Medium complexity are $4-$5 each. Very complex will be priced according to design.
 
More than 30 invitations becomes too expensive for you - e.g. 50 invitations at $3 totals $150, which is far too much money to spend on an invitation that 50% of people are probably going to throw out. So, to avoid charging too much, I don't make more than 30 invitations per order.