I picked up a Little Giant 2-MDQ-SC, last Saturday, for a mere $40 at a flea market. I haven't tested it yet, but here's some info:
510 gph @ 1'
465 gph @ 3'
410 gph @ 6'
250 gph @ 12'
shut-off at 14.4' (about 4.4m)
1.6 amps (1/30 hp)
182 Watts
good for fresh and saltwater
in-line only
1/2 NPT (male) outlet
1/2 NPT (female) inlet
This pump, although it sucks up a lot of current, is actually a hybrid of "direct" and "mag" drive. It is also designed for a higher pressure.
(Thanks to Larry Browning over at OC for the chart)
Larry Browning's article