I’m still not convinced on the collectibility argument. The market for 2000s Mustangs is soft compared to where it was 5 years ago. These will depreciate or stay flat at best. Get one because you want to drive it, not as an investment.
I actually disagree that these are collectible. The 2006 Mustang GT is a dime a dozen and hasn’t appreciated in value like other American muscle cars from that era. Too many were made and they’re not rare enough to justify collector prices. Just my take though.