The best Amiga deal I ever did was when I bought my first Amiga at list price, 450 Euros with no extras. No kidding. A major event.
The worst was when I bought a _new_ A500+ from a major chain when I worked in London. The PSU was used, the keyboard was worn, and it kept Guruing. I went back and told them, voice trembling with scorn, "How about you give me a NON-USED Amiga?" They did. I talked to some people and apparently this chain sold stolen goods. If I can find their ad from an Amiga mag I'll report back.