I was looking for an inexpensive USB flash drive on TigerDirect to fill out an order for free shipping. I noticed what I thought was a great deal on a 4GB one: only $9. But after I added it to my cart, I noticed the price of another item had changed. It went up by $4. Curious, I checked the TigerDirect site in a different browser.
Nearly all of the items I was looking at buying had different prices in the different browsers. The wifi networking cards were $2 more expensive, the headphones $5 cheaper... it was odd. After a bit of math, I ended up buying the cheaper cart (saving $4!).
If you do buy from TD, be sure to use Google Checkout for an additional $5 off.