Yeah prices might seem high now,especially for certain things like PPC cards, but if you look at an Amiga World magizine from around 1993-1995, it will give you some perspective. My A2500 retailed for around $2000 with monitor in the early 90s. I could never afford the RTG, Flicker Fixer, and memory card that I've installed recently back in the day.
You can get a fairly tricked out A2000 for around $200-300 with some smart ebay shopping. For $300-400, you can get a good stock A4000D if you look hard enough. Sniping ebay auctions and doing an rss feed of what you're interested in for buy it now bargains are ways of getting what you want. Being clear about what you want and a little patience are all you need.