In the UK
Really? Here in the UK most places now either do free shipping as standard, or free shipping if you're spending more than £xxx (usually around £100, which is usually easily done on anything big and bulky).
How big a tower was that???!!! I suppose one thing that's really helped me is removing the spare tire from the trunk; I've got a can of that stuff in there instead that inflates the punctured tire and gums up the hole. I know, it supposedly makes the tire useless afterwards, but for the number of times I've had to use a spare tire in my life (never, in 18 years of driving) the trade-off for the extra trunk space is worth it. But even with the spare tire in I'm quite sure I would've got my computer in the trunk, so yours must have been unusually big.
Eric