I had a huge pile of concours trophies for my white MGBGT. Initially we had them on display in a glass fronted cabinet, but eventually MrsW got sick of them, so they were banished to the loft. When I sold the car I parted with them all, except for the first and last trophies, and an engraved glass tankard.
When I sold my BV8, all the trophies went with it, except for two. One was an engraved piece of glassware from an invitational Concours at the Silverstone Classic when MG was the featured marque. Really though they should all have gone with the cars.
I disagree Dave. The car was the result of your hard work. You earnt the awards.