Watch this seller:
http://cgi.ebay.de/ws/eBayISAPI.dll?...tem=3867301088
When he have skimmed the market, the 4041 spindles will go for $500. (They did one year ago). But you will need the inverter to drive them. Make sure you budget to cover that. The 4052 is super for PCB routing+drilling. The 4041 can do heavier work (500W).
The toolchanger will release tools up to 6mm shank. The collet stays in the spindle, but can be changed to smaller. That is a manual operation though.