A quick search of keyword "bitcoin" revealed nothing on eBay. Further reasearch revealed that bitcoin would likely fall under the definition "instant cash transfer service", which are not permitted.
"eBay.com.au prohibits the use of instant cash wire transfer services." -http://help.ebay.com.au/Help/Buying/Payment-and-postage/Payment_methods
"Payment Services not permitted on eBay: AlertPay.com, anypay.com, AuctionChex.com, BillPay.ie, ecount.com, cardserviceinternational.com, CCAvenue, ecount, e-gold, eHotPay.com, ePassporte.com, EuroGiro, FastCash.com, Google Checkout, gcash, GearPay, Goldmoney.com, graphcard.com, greenzap.com, ikobo.com, Liberty Dollars, Moneygram.com, neteller.com, Netpay.com, paychest.com, payingfast.com, Payko.com, paypay, Postepay, Qchex.com, rupay.com, sendmoneyorder.com, stamps, Stormpay, wmtransfer.com, xcoin.com" -http://reviews.ebay.com/How-to-sell-on-ebay-without-using-Paypal_W0QQugidZ10000000001394632
A few years back eBay attempted to force all payments to be made via PayPal (in Australia). Even Internet bank transfers would not be permitted. There was an uproar from sellers, and I believe anti-competitive laws crushed these plans at the time.