Shaw started selling the Motorola DCT3080 about 2 years ago for about $350 when the HD PVR was $700. Motorola discontinued them and the last time I saw Shaw selling them was for $150 for refurbs. I checked this fall for a relative who started working evenings and they're no longer available.
The 3080 was an analog/digital PVR that recorded about 80 hours of SD on an 80 GB drive. It could also record HD channels but could only play them back as SD.
You might be able to find a used one but I think they are fairly rare.