Hmmmm... Not calling her a liar, but I personally did not ever see any $100 Lego sets go on clearance. And I've been to 14 Targets since after Xmas. The ones I was seeing last night WERE $24.98, which is 50% off of the $49.99 reg price. Perhaps it was that one...
I went to my Target last night, they had about 30 of the Lego Space Police sets still at 50%, and this morning they were gone -- found 1 left and scanned it, so they were salvaged, no 75%!