Two experiences with vendors today: first one gave a credible presentation and quoted some good prices before departing with a promise to put the quote in writing later in the day. Lo and behold the quote arrived via email with a cost three times as much as that quoted during the meeting. The excuse? There were two: i) Quoted in the wrong currency during the meeting ii) it's list price so not really the price we'd pay.
Second vendor is trying to sell the same product to three different parts of the same organisation at three different prices....
I enjoy negotiating but only with people I trust. Once my bullsh*t detector starts twitching I tend to lose interest in how good the product is..