I never made more than one offer at a time, but I thought about it. During the buying process, I withdrew my offer on a few so that I could make an offer on another. I waited 5-7 days, and if I heard nothing I would formally withdraw my offer so I didn't feel bad about making another offer. I figured after that many days, they are probably looking for a higher offer, and I figured that if they were holding out then there was a higher potential that they would be looking for a higher bidder during the entire selling process. I thought that if there was some legitimate reason why they needed more than 5 days, they could contact the broker and ask if I was still interested. Looking back on it, I probably should have put a time limit on the offer - it would have saved me some time in finding the right seller.