The board sponsor (
dvcresalemarket.com) puts out a monthly blog with average resale prices. Fidelity also puts out their own. The ROFR thread trends lower compared to most reported average resale prices put out by brokers, so being somewherein the middle of the two would be a good indicator of a decent price, imo.
I know some here disagree with me, but I think
it's perfectly fine to put out multiple offers at the same time. Some brokers take awhile to respond and I wouldn't want to lose out on a potential deal just because I was waiting for a response, especially since sellers are often entertaining multiple offers at the same time. I've had sellers/brokers stop negotiating because they've already agreed on a price with another buyer, so it really goes both ways. You're not committed to anything until you sign papers.