This doesn't seem to be on the website, but at my local Harbor Freight (near Sacramento) today they had the 2 ton aluminum jack for 89 (they didn't have any in stock) and the 2.5 ton for 99, both of them marked as clearance. I bought the only 2.5 ton one there, and it rang up at full price (169) but they adjusted based on the clearance tag on the display. From looking at the clearance tag, it was a computer-printed price tag, so conceivably could apply to other stores as well.

Just sharing in case someone is looking for an aluminum jack, might be worth looking at to see if your local store has the same thing. The 1.5 ton is regular price of 84 I think, so I felt lucky to find this 2.5 ton on clearance for only a little more.