Proof or B.S. I say, big call warning folks off supposedly fake items with no other information than your word.
your call, sure they are good copies, they fooled you didnt they.
this is where they came from
http://www.alibaba.com/product-gs/364795929/chain_saw_ms_070.html
http://www.alibaba.com/product-gs/464014525/chain_saw_ms_381.html
http://www.alibaba.com/product-gs/428586375/chain_saw_ms_250.html
they range from $300 landed from china.
if i wanted to save money on a stihl i would get one shipped from the US from a trusted friend/accociate, as stihl dealers in the US wont export as it risks losing dealership rights.
theres nothing against using a 3rd partys however to buy and dispatch on your behalf.
and then you could get a genuine current range stilhl like a ms261 for about$ 715 aud landed.
if you wanted a knock up you could get one from china yourself for less but at least you wouldnt be under any illusion you were getting a genuine.
china link for ms 070 knock up www.dhgate.com/stihl-ms070-chainsaw-4-8kw-105cc-36-quot/p-ff8080813184c93c01318633c3a91868.html
china link for ms 081 knock up http://www.dhgate.com/stihl-gasoline-chain-saws-ms-381/r-ff8080812afb80ec012afdcf6ab83b1b.html
china link for ms 381 knock up http://www.dhgate.com/stihl-ms-250-gasoline-chain-saw-oo-4600-ce/r-ff8080812afb80ec012afdd141403e9e.html
that guy is flogging em as genuine and starting em at $600.
try running one of these knockups at 50:1 fuel mix as stihl recommends rather than 25:1 that the chinesse links suggest and just see how long the P%C hold up.
but again your call,