The cost of a small CNC machine that can mill aluminum can vary greatly depending on the specific features and capabilities of the machine. However, you can expect to pay anywhere from a few hundred dollars to several thousand dollars for a small CNC machine that is capable of milling aluminum.

Here is a table of some of the most popular small CNC machines that can mill aluminum, along with their approximate cost and URL:

MachineCostURL
SainSmart 3018-Prover$350https://www.amazon.com/CNC-3018-Pro/s?k=CNC+3018-Pro
Genmitsu 3030-PROVer MAX$849https://www.amazon.com/Genmitsu-3020-PRO-Controller-Switches-Emergency-Stop/dp/B09KTV13TY
CNCTOPBAOS 3 Axis 1310 CNC Router Kit$299https://www.amazon.com/CNC-Router-Kit/s?k=CNC+Router+Kit
MR-1 CNC Gantry Mill$4495https://www.langmuirsystems.com/support/mr1