Ofoto Photo-insert cards (a photo is fixed on the card) range from $11
to $15 for each set of 10, depending on the order size.
Custom-printed cards (the photo is printed onto the card) can have
specific messages for each recipient and be sent directly to your
mailing list. Prices (without postage) range from $1.50 to $3 per
card, based on the order size. www.ofoto.com
Mystic Color Lab For $15, you get 20 photo cards (six border options) and envelopes. www.mysticcolorlab.com.
Shutterfly Make each custom-printed card as personal as you want and have
them sent directly to your mailing list (you even specify the
stamp). Prices (without postage) range from $1.50 to $2.50 per card,
based on the order size. www.shutterfly.com.