Im in Australia, and I buy alot of my fabrics from ebay from the US. Never had a problem.
As everyone is saying, fabric here is very expensive, and sometimes the quality is not that great either.
we have a number of patchwork shops here in Victoria, but again are quite expensive.
You can actually get the fabric cheaper, even with the postage from the US, something that cost about $25 AUD here, will cost $16 AUD from the States and thats including postage. If you buy sort of big, like 7 yards at atime (thats what fits in a prepaid UPS envolope the US$13 one) then it works out really cheap.