I'd say it would depend on whether the price is advertised along with the guarantee.
If there's no footnotes, then it should be unconditional.
A bit off topic, but an interesting tale of ethics:
I'm a member of another computer forum, and news got out that a big PC company had made a typo on the price of their hard drives. Their on line ordering system automatically billed your credit card, and confirmed your order. The thread went crazy and it was the fastest growing thread on the forums, with some people ordering bulk (hundreds) numbers of hard drives at about five bucks a pop from memory. There was a lot of debate about ethics in the thread as well, with the community divided over it. Greed had well and truly set in, and the company lost a fortune honouring their commitments under threat of legal action, but they got away without honouring multiple orders by arguing that it was obvious to the purchaser that they were taking advantage of a mistake. No one in the market for hundreds of hard drives would actually think that the price was genuine. It was so ridiculously low.
Everyone who ordered got a single hard drive though.
Most unfortunate since the company had no intention of baiting the public. It was an honest mistake, but the vultures pounced on it.