Hello wise MNers. Sorry this is long.
We live in SW london and have been trying to move since 2018. We have a lovely house, but titchy garden and small master bedroom. We can't reconfigure to solve these issues, so will move. We want somewhere to retire into and it will be our final house. (5or so,years to retirement)
The idea is get a house with a much bigger garden and big master or loft that can be converted. This fits with my love of gardening, and being fed up,of bashing into DH in the cramped bedroom.
We've missed out on 3 perfect houses so far. Once when we had buyers but were outbid, once where we had no buyers and were massively outbid. (£200k over asking price on £1.2m house), and once when we put in an offer but couldn't get a buyer in time. All in 2018\19 when the market was alive. We've been looking ever since and only 1 has come up that's suitable.
The issue is there is NOTHING on the market locally in our price range and 1-2 houses a week only coming on. So when/if a suitable place comes on, we probably need to be proceedable. BUT we did that before and after 6 months of not finding anywhere we took ours off the market and told our buyers to find elsewhere as there was no end in sight. 
So. Should we
A) market now, and get a buyer then hang on, maybe for 12 months or more given current slow market ?
B) keep looking no sell ours fast once we have an offer accepted ?
C) wait and see what covid does to the market once things normalise a bit more?
What do you think wise house buyer seller people?
At this rate I'll be retired and too decrepit to move anywhere 