Oil changes should be like $20 if you bring your own oil, it is the Mobil that is expensive.

I foresee issues with SRT6 ownership, like parts availability. Right now if you need a new hood, bumper, or rag top I think you are S.O.L. when it comes to OEM parts, granted Chrysler/Kharman might get back in line.

The price is not out of line at all...
Look at a 2003-2004 Jaguar XKR price, supercharged, leather everything. About $20k.
Look at the SRTs daddy, the SLK32 AMG. Around $20K.
Look at the 2005 SLK55 AMG, the SRT6 upgrade, V8, something we may never have. They are coming way down right now. I looked a few months ago and they could be found right over $30K, now they can be found from $25-30K.
GXPs and Redlines should be well under $20K
M3 Cabrios with smg, Z4s, $15K.
If you really want ot see some people that are hurting then price an early Caddy SLR-V
So a 2005 SRT6 is holding up pretty well.