If you bought one in the 80s you could be sure DEA had painted it with transponder gear and were taking pics of whoever was looking at it to buy
Helluva bird
True about the DEA. We bought a 40yo twin engine aircraft some years ago from Colombia. Hubby got it to the US and the nize Fedbois were all over it and then angry/disappointed because (of course) they found nothing.
Fun people.