The Barieri is seriously expensive, next down the list of pain is the X-Rite isis, followed by the newer io.
Other than that you're going to be searching eBay and old good auto spectros are pretty rare.
The above models turn up s/h now and again, as do the older Spectroscan and DTP-70. Buying secondhand has risks associated with it, unless the calibration has been recently re-certified it will be a bit of gamble with respect to reliability and accuracy.