For over a year now I have been using www.moo.com for my business cards. They are simple, cost effective and pretty darn cute. The great thing about moo.com business cards is that you can order in small packs and customise the image on the back to suit. You can have 50 cards with images of each of your property listings on the backs and each can be different.
Agents may also opt for a 50 business card pack for each property they are selling at a cost of $21.99 USD (about 23 AUD), this will not only impress your vendors but also potential buyers.
Each order I have made takes around 10 days to arrive in nice packaging and the systems let you know exactly how the process is performing.
The process for creating the cards is simple and intuitive and is really quite fun. Moo have got this down pat and I simply love the effectiveness of their systems.