It wouldn't hurt to ask them if they could pay "market value". After all, those other offers are proof of your actual market value - not some abstract idea of w

It wouldn't hurt to ask them if they could pay "market value". After all, those other offers are proof of your actual market value - not some abstract idea of what you are worth. I wouldn't mention your other offers unless they press you to justify how you arrived at your "market value" number. No one wants to be in a bidding war. If they give you the "We think we are offering matches the market." then ask them if it would change their minds if you could show them what the actual market it. "I've considered everything and if you raise the offer to market value and add bit more vacation I can start on Monday." "I'm looking forward to working with you. Make it $N and X weeks vacation and we have a deal." Let's face it though, some places just do not value engineers. If they are cheap at the start, they will never, ever "make it up to you".