I'm sure you've given this a lot of thought, Mama, but auction it only as a last resort.
In the current poor market, people with cash are trawling for cut-price property. If it has had no interest so far, then bidding is likely to be low......... to you, insultingly low :o(
Resorting to auction to "force" a sale just doesn't work in a lot of cases. If you set a reserve of, say, £90k .......... you'll probably get bids between 50 and 70, and you'll be stuck with a bill for the auction (unless there's some arrangement over no sale-no fee, which is unlikely)