I'm looking to buy this lens- was also looking at the Tammy 70-200, but the differences seem too small to be paying $300 extra..
I have someone that bought Sigma in 2012 and sold Canon gear and went to Nikon in 2013, meaning Sigma was used for less than a year.
Practically new condition. She agreed to send in original receipt as well as a blank warranty card for $925. Spoke with Sigma rep and said normally, although company doesn't allow warranty transfer, that it would be okay to get it serviced. Is that a good price?
For the Tamron I was budgeting about $1050 or so, but people were trying to sell their 2 year old lens for 1350!
BTW, if you're selling Tammy, let me know!