Most expensive thing in your spare room?

[Spinneret]

the printer that never gets use

 

[luvnwdwgal]

Coin collection that belonged to my father-in-law.

 

[Meriweather]

2 spare rooms (other than offices).
In the one that DGD uses, probably the bedroom set
In the one that DGS uses, probably the rug shampooer that is in the closet