This is too good not to pass on. Ajalon Printing & Design is running a special where you can get 100 single color, letterpress wedding invitations (plus response cards and envelopes) for $398. Letterpress for $398! But the special is only good through August 31st, so you'll need to have your order placed by then.
They have a ton of designs to choose from. I'm partial to Brenda at the moment:
And if you need help with your wording, I suggest using the Invitation Wording Wizard.