Copier at work might do the job... (Score 1)

If you work at a place that has a commercial-grade copier, they most likely have a scan function that will scan to PDF (or TIFF) to a folder or an email. You can get rid of a large backlog of paper and then once caught up, go for a consumer-grade duplex scanner like the ScanSnap (from what I can tell from the reviews it is the best of its class, but I don't own one.)