In Japan you can rent manga in some places, for example in some Tsutaya shops. It is interesting the Tsutaya strategy, they showcase manga in shelves looking like DVDs. Look at the pictures, it looks like it is all full of rental DVDs but it is not, it is manga!
One volume, three days (70 yen). One volume, during one week (90 yen). If you rent more than 10 volumes the prices are even lower.