I went to buy an air filter for my truck recently. I did on-line shopping that showed WM was the least expensive, with Fram, in my area. The WM web site showed the TG air was considerably less expensive than the Purolator blue filter at AAP.
Went to WM and shelf price on the TG was about $5 higher than at WM web site. I took the TG from the shelf to a price checker scanner and it verified the shelf tag price. I was a bit hacked off by this so I didn't buy it.
Went home and checked the WM web site again and sure enough the WM.com price was about $5 lower than the shelf price for the TG, so I purchased it on-line for in-store pickup. Saved $5 that way. So I did the same on-line purchase at the second WM where I live and picked another up for a future air filter change.
It's weird - the Fram Ultra oil filter for my wife's car is about $0.70 cheaper on WM.com than the shelf price in the store. But the TG2 that fits my truck has the same price at WM.com as the shelf price in the store, so it isn't consistent.
My advice is to try checking the WM.com price for the TG air filter that fits your vehicle as part of your decision process. It made my decision vs. Purolator blue air filter a snap!