At the cheaper end of the market is an "unwanted, brand new, on card, still sparkly cute koala brooch" - buy-now $6.50.
Worst value must be the "New - Singing and dancing baby - faulty". This baby-like figure, which comes replete with sunglasses, bow tie and pipe, is an unwanted gift that has been in storage for some time.
If you want it, it can be yours for a mere $5. But be warned: the seller says, "... we have put the batteries in, but it no longer dance nor sing".
Thinking ahead to the next school term, an eraser can be bought for $2, making it among the cheapest "unwanted Christmas gifts" on offer, although be prepared to pay a $30 courier fee if you live on Stewart Island.
Speaker/docks for old iPhones and iPods are going cheap at about $20.
A pillow in the shape and colours of a slice of watermelon is on offer for $25
And if you're a bit tired after bingeing on pavlova and trifle this afternoon, why not consider some cleansing detox foot pads, which will only set you back $3.90 for a pack of 10. Claimed to relieve stress, release unwanted toxins and increase your energy level, they could be just the ticket to set you up for the Boxing Day sales.