Hi jb - hope you are all well. I would always ask for quotations rather than estimates. You need to be so specific and agree the level of workmanship required. I think a realistic price is the best option to choose rather than necessarily the cheapest. Far better to get satisfaction first time round. There is a competitive market, more than ever, to get the work in during hard times, but one needs to be sure that the work will meet your expectations. Never any harm in trying to reduce prices, within reason.