I'm not trying to attack Devildog, but I have seen alot of his posts where he defends HMS and slams folks who don't see it his way. I think one would have to be wearing blinders to not at least recognize significant problems with the HMS outfit.
I personally think it is funny that he would suggest a dyno is in order "to ensure the parts are still on the car". I would absolutely agree with his advice and say the car should be checked out - but not becuase the parts may have been removed, but because there are many cases of HMS cars not performing as they were supposed to and if one is going to pay for an "upgrade", one should ensure the upgrade is there in full before spending more money on it.
Devildog, I was serious about my question, but if you don't want to answer, that's fine. I have never heard of claimed performance parts being removed. I can't see someone pulling the heads and cam from an HMS car (to sell seperately?) and installing stock parts in their place.
As for the original question, the upgrades are never worth what is paid for them. They depreciate alot more than the car does. If the car has lost half it's value (adjusted for inflation, of course), then I would expect the parts have lost 3/4 of their value in the same amount of time. if the package price was $22k, I would say it's worth no more than $7k over a similar stock car.
But in reality they are worth what someone will pay for them... which could be more or less.