Bell Mobile of Canada is one of the CDMA carriers who are planning to switch to GSM in the near future – as the launch of the new network along with new devices is approaching quickly, “old” devices like the Pre need to be thrown out ASAP.
In order to facilitate this, the Pre has now been reduced to 100CAD on a three-year contract:

Before anybody goes batshit: Bell has not stated any intentions to turn off its CDMA network for the near future. This means that you shouldn’t worry too much – you will be extremely likely to use that Pre for the next three years…
Further information can be had here:
http://www.bell.ca/shopping/en_CA_ON.PalmPre/68346.details
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But… this 100 $CAN price only applies if you take a voice+data plan. The data option is a 30$CAN/month addition to the bill.
Hi Luc,
seing that this carrier is always insanely expensive…
In Austria, I pay 40 Euros for my two phones…
All the best
Tam Hanna