Price is at the upper end, and probably the most someone would pay; those cabinets look nice, and the poster has plenty of marketing text. Saying that the accordian-edged woofer is more desirable than the foam edge one is a marketing stretch by the poster IMO.
Yes, you don't need to refoam the L200 woofers (LE15B), but they are generally thought to be sonically inferior to the later L200B which used the foam-edged woofer (136A) and a modified crossover. JBL engineers got the upper hand on the marketing folks with the L200B and went more for sonic accuracy.
From Lansing-Heritage website:
"The original L200 was developed in 1971 as a result of pressure from JBL's marketing division to have a large speaker for the burgeoning rock market. They dictated that it have an accentuated midbass response that they felt would appeal to rock listeners. JBL's engineers addressed this by modifying the LE15A with an underdamped suspension, lighter cone and corrugated surround that resulted in an ill defined but boomy response."
To borrow the fundamental Zilchism on the sonics of the JBL L100: "Fake but fun." The L200 (not the later L200B) can be thought of as a L100 on steroids (which IIRC, Zilch has also posted).
This is from a L200 owner -- I like them for what they are, but don't expect them to be the sonic end-all and be-all.