These are my regrets. Objects I have not bought at "Ham Radio 2015" in Friedrichshafen but I should have.
A Fluke 8050 bench multimeter (~50 €).
A Heathkit G-1 signal generator. Found under a table. Looked nice.
A strange 1960's telephone loudspeaker (1 €).
A metal box with three flanged N sockets (probably 1 €!).
An empty metal box with handle (probably 1 €1).
There were other interesting things too, mainly stuff older than me. Either too expensive for a home ornament or too big to transport in a already fully packed car.