You shouldn't post this deal as $19.95 in the thread subject when you've clearly identified in your opening message that S&H is $11. That makes this deal $30.95. Furthermore, this is for a REFURB'd modem w/ a 30 day warranty (something you neglected to mention in your opening message).
If you're willing to pay $31 for a REFURB'd 3COM 3CR29210 cable modem (w/ 30 day warranty), here's a better deal on the same brand and model cable modem from
TechDepot:
3COM 3CR29210 Cable Modem, OPEN BOX (missing UPC CODE) w/ FULL 5 YEAR MANUFACTURER's WARRANTY @
$29.95 shipped FREE. If the modem you receive is defective, TechDepot will issue you an RMA with a PRE-PAID UPS SHIPPING LABEL (they'll e-mail you the SHIPPING LABEL).
*EDIT* Forgot to mention, TechDepot (as of this posting) only has 5 of these modems left.
*EDIT2* Fixed TechDepot link. Also, only 1 modem left @ TechDepot (as of this update).
*EDIT3* Actually, the model at SoftwareAndStuff (in the original post) is a 3COM CMX 2940. The TechDepot one is an OfficeConnect one (newer model I believe which is DOCSIS 1.0 compliant but DOCSIS 1.1 capable. Since 3COM doesn't make cable modems anymore, good luck finding a firmware upgrade to make it DOCSIS 1.1).