SanDisk 4GB SDHC Media Card 9.77 with free shipping at Buy.com

As you can imagine, the Sun-Sentinel Photography staff needs reliable equipment, and this can get expensive. We are always looking for the best prices to keep the staff adequately supplied.
The buy.com weekly specials are worth watching. This week they have a great deal on SanDisk 4GB SDHC cards (SanDisk 4GB Secure Digital High Capacity (SDHC) Card - SDSDB-4096-A11.) They are usually $39.99...this week they are $9.77 with free shipping.
A word of caution: older digital cameras do not support higher capacity cards, they require SD cards, not SDHC. Make sure your camera is SDHC compliant before you order one. I made this mistake when I went to Italy last fall. I wanted to be able to shoot unlimited pictures, so I stocked up on media cards before I left. (It's time consuming, and wears on your battery to keep deleting the bad pictures to free up card space, I prefer to do that when I get home.) When I inserted the 4GB SDHC card, the camera blinked a flashing message of rejection, the card, not me!! Thank goodness I had others!
A second word of caution: With buy.com, as with any online free shipping deals, be very careful as you check out, that you select the free shipping option. Often the order form defaults to a higher shipping price, and if you don't take the extra step to find the free shipping option, you will be in for an unpleasant surprise when you get the invoice.
Has that happened to you? Do you get that 'ripped off' feeling, when a website advertises free shipping, then charges for it because you didn't know to select that option?