They've been fairly hard to find lately, so the price went up. 750k was actually fairly low, they hovered around 1 mil for a long time (since mannequin pumps were added, pretty much), then dropped down to 600k for a few weeks due to a supply glut, then spiked recently due to shortages and overall inflation.
Edited, Fri Feb 3 06:19:54 2006 by Hripthe