As you say, it may depend on what you sell. Elsewhere, I sell most of my items on 'Best Offer'. Internet selling is not my main source of income, but I have had my best two months ever on sellbay - turnover and net profit (four figure months) - using 'Best Offer'. I never used to use it; I am now a convert.
However, 'horses for courses'. Plus, I am against compulsion.