Best (cheapest) place to buy a laptop adapter charger?

Ebay has the one I need for $39 + $10 postage
I know from experience that Ebay is not the cheapest place for new items but don't know where else to look and I don't know what I should be paying for it?
batterymall.com.au has it for $45.71 (+ postage I assume)
laptopplus.com.au has it for $55.00 + postage
Maybe ebay is the go?
I know from experience that Ebay is not the cheapest place for new items but don't know where else to look and I don't know what I should be paying for it?
batterymall.com.au has it for $45.71 (+ postage I assume)
laptopplus.com.au has it for $55.00 + postage
Maybe ebay is the go?