its one of them things. Rear seats you normally can`t give em away, but yours are red and sods law says if you give em away someone will post on here a wanted ad offering £100 for said seats...
Have you thought about converting them to a rock and roll type bed. It can be done and keeps your seats for if you need them. If not id shove them in the attic, either till you need them or someone needs them so bad they are willing to pay good money.