CNC laser cutter home made parts list

[spazmoid]

hey this is the parts list for my planned cnc laser cutter/engraver.
the main objective of this is to be cheap with a large cutting area and decent power.

All prices include postage to the uk and import taxes and are adjusted for quantities.

1x Latest CNC 4 axis 3.0A USB Stepper Motor driver Motion controller Card Engraving - £39.99
http://www.ebay.co.uk/itm/261880399976? ... EBIDX%3AIT
1x 3.5W NDB7A75 445nm 450nm Laser Diode In Copper Module W/Leads & G-2 Glass Lens - £152.44
http://www.ebay.co.uk/itm/171354792786? ... EBIDX%3AIT
6x LM__UU CNC LINEAR BALL BEARING, BALL BUSHING, LINEAR MOTION, SLIDE BEARING - £34.68
2x Nema 23 Stepper Motor 1.26Nm 2.8A 4-wires 6.35mm Shaft DIY CNC Robot 3D Printer - £37.00
http://www.ebay.co.uk/itm/121651189123? ... EBIDX%3AIT
2x L500mm CNC SFU1604 Ball Screw Ballscrew with Single Ballnut End Machined DUK - £65.56
http://www.ebay.co.uk/itm/381277329412? ... EBIDX%3AIT
4x 303 STAINLESS STEEL Round Bar Steel Rod Metal MILLING WELDING METALWORKING (1000mm) - £51.96
http://www.ebay.co.uk/itm/181309241745?var=480325454969
1x Laser diode driver 0 - 5A 100kHz ANALOG TTL 445nm 635nm 3-12V - £27.98
http://www.ebay.co.uk/itm/SALE-last-2-p ... 35ec8059ec
1x 1pc 10W Watt LED Aluminium Heatsink Long Round - £10.14
http://www.ebay.co.uk/itm/160633172904? ... EBIDX%3AIT
2x DR CNC Stepper Motor Flexible Coupling Coupler 10x10mm D20L25 - £6.98
http://www.ebay.co.uk/itm/251488515450

total=£426.73

so what do you think? do you have any suggestions for better parts or cheaper suppliers?
thanks for viewing