Switch mode power supplies for LED lighting

http://www.ebay.com.au/itm/12V-30A-360W-Switch-Power-Supply-Driver-For-LED-Strip-Light-Display-220-110V-/321161097219?pt=AU_B_I_Electrical_Test_Equipment&hash=item4ac6b17003

How reliable are these things from ebay? Should alarm bells be ringing about a 30A supply for this price?

For less cost you can get a power supply for a computer that supplies 12V and the same approximate amperage, so no, no alarm bells needed. If you require a full 30A though I'd look for a larger supply to make sure you're not pushing anything at their limits.