Amtrak is offering a 30% bonus on purchased points from now until December 31st. This brings the cost of 650 points, bought in increments of 500 plus bonus, to $13.75, or 2.12 cents per point.
While Amtrak adjusted the prices for its awards upwards in April, Northeast Regional coach awards still run a mere 4k points (or about $84.62 under this sale) and offer last-seat availability. A last minute revenue ticket can easily run more:
While booking with Avios is another good-value for short haul flights, capacity-controlled award inventory can be problematic: