I just bought a pond pump from Harbor Freight. The cashier informed me that once the box is open the store will not handle returns, it has to go through the manufacturer. Boo.

I buy lots of stuff from Harbor Freight, mostly consumables. I have found that they often times have the lowest prices, but also the worst return policy on some items.
Case in point, I purchased a Bauer Clamping Workstation from HF a few years ago.
I really liked the features of that clamping workstation. It was supposed to be a knock-off of the Worx Jawhorse...
I mean, even the sliding jaw parts were interchangeable on the two units. So, I bought the Bauer unit at HF and saved about $80.00. However, the HF Bauer unit only had a 90-way warranty whereas the Worx Jawhorse has a 5-year warranty.

It broke my heart when my Bauer clamping workstation broke after a couple of weeks. I suspect they just used inferior metal and it could not do the work I needed to do. HF discontinued that unit, and I had to get a full refund. No exchange was available.

Anyways, sometimes you need to figure out the working life of a unit under warranty replacement instead of just the initial purchase price. Especially for tools and equipment that take a lot of abuse just in normal usage.
For example: HF Bauer clamping workstation at $150.00 for 90-day warranty = $450.00 per year for warranty coverage.
The Worx Jawhorse at $250.00 with a 5-year warranty comes out to $50.00 per year for warranty coverage.

I like to save money, and sometimes that means I might have to pay more for a better made unit with a longer standard warranty to back it up. Certainly, that HF Bauer unit was not a great buy even at a lower price. I'm just glad it broke within the store return period or I would have lost all my money on that purchase after 90 days.