I think they still have "Grasshopper" (the custom test unit) sat outside at McGregor, it was F9R Dev1 (a modified F9 booster) that they had to destruct after on

I think they still have "Grasshopper" (the custom test unit) sat outside at McGregor, it was F9R Dev1 (a modified F9 booster) that they had to destruct after one of the engines failed mid-hop. They were originally going to do high-altitude tests with an "F9 dev2" (similar to some of the early starship test launches) - but they gave up and just did some testing with real landing Falcon 9s instead.