Good news! Price is not determined by design but by printing method. So, every invitation, response card, etc., is same price throughout the site. Choose a COLLECTION [Semi-Custom] and pick items you need. Here are pricing examples: 

FLAT PRINTING: 
100 Save the Dates (S00) = $168.75
100 Invitations (I00R) = $213.75
100 Invitations with backing (I00R(B)) = $360.00
100 Response Cards (R00R) = $135.00
100 Response Postcards (R00P) = $157.50
Envelopes, liners, pocket folders, and more sold separate at SHOP ACCESSORIES

THERMOGRAPHY PRINTING (2 Colors): 
100 Save the Dates (S00) = $247.50
100 Invitations (I00R) = $438.75
100 Invitations with backing (I00R(B)) = $569.25
100 Response Cards (R00R) = $247.50
100 Response Postcards (R00P) = $247.50
Envelopes, liners, pocket folders, and more sold separate at SHOP ACCESSORIES