Technically I didn't buy it, but I logged in to eBay when at college using my mums username and password.
I was naive and didn't realise credit card details where already entered so me and a friend bid £1M(or some extautionate/round figure) on a stuffed dog with 1 second to go.
Mums credit card company then got in touch and the police were due to be contracted.
I confessed, eBay cancelled the order and I missed out on a lovely stuffed Alsatian.
But it was being sold by 'Rails of Sheffield', who are one of the longest established model shops in the country, and I had seen the model at exhibitions so maybe it doesn't count.
As they normally retailed for £ 2,500 and were limited to only 111 built I think I did ok.