Get the last five digits of the Vin and see if it has been owned by a forum member. If it has read up on their posts. If the power drops off then the ic pump may be faulty but otherwise look for brake wear, abnormal fluid smells ect. The for sale section can show you what the market is for the SRT but may be a little more inflated if the owners car care behaviors are well known or the car sold with mods.

Good luck with the purchase and welcome to the family.

Jason