I too inherited my mother's prolific stash of completed afghans, many, many baby afghans. She passed away in 1998. I kept them all and as granddaughters married and now great grands are getting married or setting up homes they are gifted with an afghan, note and picture of their GRANDmother.
With care these afghans last forever it seems. My husband and I still sleep every night, under the one she crocheted and gave to us when we were married nearly 45 years ago.
In these difficult economic times, you and your heirs or someone within the family may need money....they could also be advertised for sale if you are not comfortable donating them....No harm in that should someone need the money IMHO.