Eric,
Theres a lot of differences in various salaries and positions for candidates. Looking at the market rate it varies from years of experience, Nationality , Bennefits etc.
Are you happy with the offer ? If yes accept it ... Most people are worried what on others plate and not whats on their own.
Look at your current situation and judge rather that looking at others

I do not mean to sound mean or rude but its simply facts you need to adapt to

thanks