Sounds too good to be true to me.
KBB on yours is ballpark 6k-7k, the SRT6 ( if in decent shape ) should be in the 10k-12k range.
You will want to run a VIN check for damage, make sure the car has a clean title ( not a salvage title ).
Drive the car, make sure it has full power across the range.
A quick look at the engine will tell you if the owner really cared about the car, most on this forum are SPOTLESS !!!!
Make sure the 5 speed auto shifts smoothly, use the manual slap stick functions also.
Check the underside of the doors for rust/corrosion, also dig into the trunk well looking for signs of moisture due to water leaks.
Is this a roadster ? If so, then add another 2k or so to the KBB valuation and check the rear window glass to fabric bond..