Go on vistaprint they have super pretty ones plus you can design your own which is what I did. I'm waiting for the Black Friday sale so that they are 70% off
I used Vista print... I was happy with them. Additionally I have Incorporated the invitation design for 2 signs I will have. I was happy with their as services.
I ordered my STD from Vistaprint and will also use them for invitations. STD were 29.99 for 150 after discounts. Have prices invitations yet, I'm waiting on the Black Friday sale.
I tried print at home invites and they were a disaster. The ink (which I confirmed 100 times was compatible with the cardstock) would rub off the cardstock - even when left to dry overnight, several days, a week! I even tried taking them to Staples, Kinkos, and Office Max but they all turned me away because the cardstock was too small and would jam their commercial printers.
I ended up ordering from Minted.com in a panic. They turned out beautifully and I got many compliments on them but I wish I would have researched vistaprint more because they are significantly cheaper. I am using VP for some other wedding activity invitations and I'm excited to see how they turn out.
If you are very crafty and enjoy doing those things, do it yourself. If not, just buy them. I agree with other posters though, Etsy and Vistaprint are great options! (I'm designing my own invites and having them printed at a local printer). Good luck!
I did a combo. Bought from Michael's online invitations and tweaked a little to make more high end. Depends what you are going for. Hard to make as nice at home imho.