We were one of those in London in 2017 on Rightmove that didn't sell. We had interested parties that didn't have buyers themselves due to no 1st time buyers entering the market.
DH also had a job offer in hand, we couldn't face hanging on if we got a buyer and the chain falling through if we waited 6 months.
Rents are still very strong, interest rates still very low. I don't regret our decision, we got to move on with our lives.
Call us time wasters if you will.