Yes I'm there (in NZ). Buy now is optional and this vendor hasn't offered it. Yes people can put in a last minute bid to top you. What I would do is decide the most you want to pay ($120, $150 or whatever and then enter that figure and tick the box that says "auto bid" and then place bid. It won't show up and your bid will remain at $100 unless someone outbids you. If someone bids $110 a bid for you at one dollar more will automatically be made ($111 in that case) and this will continue up to the maximum you have selected. If no-one else bids you will still get it for NZ$100 (AU$79.19). Postage should be about $20 -$25.