I want to say there was a built Roush with an Icon stage 4 kit and a lot of extras with 100K miles on it going for around $50K not that long ago in southern Nevada. This is with all the work recently done this year by a very good shop out of Las Vegas. So for what it’s worth, there’s plenty out there with the same mods for a little less or the same.
That said, I have 90K on my ‘13 and hope to get another 120-140K out of it. So if you have the money to spend and you’re not going to put too many miles on it, make yourself happy. Or, buy a clean, stock Gen 1 for around $40K with the same miles and build it yourself so you know what is done to it and it’s your own in that sense.
The choice is yours and good luck either way!