I do not think he has good point.

Your radio going out is strange. Alternators are hit and miss I have had one last 17 years and one died a month after new car warranty ended. Leaking valve gaskets are not uncommon for these cars. As far as the cables I wonder if was stored in a damp location. None of this hardly cost you a pile of $ to fix.

I bought my car almost 6 years ago with 3700 miles now has 18,500 miles. I have replaced transmission conductor plate. Specific to SRT6 the O-rings on the oil cooler and the intercooler pump. If you do not add in regular maintenance costs, I am at well under $300. I can live with that.