RSL made a whole bunch of speakers and seemed to have a reasonable reputation for quality. Those look like they might have been their JBL imitation. Hard to tell whether they are worth it without hearing them, but I would guess that they are not a tremendous steal, though perhaps not a bad deal.
I have had a couple pair of RSL speakers. I still have the Elans, and gave a pair of the 10" woofer monitors to a friend. He uses them with the Marantz 4300 I fixed up for him, and he loves them.