In my search for historical data that includes delisted securities (to avoid survivorship bias in backtesting), I found that Tradestation is one of the few vendors that offers these data. When talking to them I was under the impression that the data stays on their server however, and that you can't do an automated download of the data for a whole universe of stocks and subsequently export it (I am planning to analyze the data using a statistical package). Anyone has experience with this, or knows a vendor that offers similar data at a similar price?