I've been watching that one too, but I don't think it's ever on sale. In fact, they have RAISED the price...
When I first posted on this one (https://budgetlightforum.com/t/-/3603), it was only $40, now it $45! In the meantime, get one of the cheap red ones they giveaway for free with a coupon...
http://www.harborfreight.com/7-function-multimeter-98025.html