The phrase "several hundreds" means a large number, but not an exact count. It is used to describe a quantity that falls within the range of 200-900 or more.
They can mean a difference of several hundreds of dollars, according to those who follow the used - car industry. (articles.orlandosentinel.com)
And bicycles can cost anywhere from several hundred dollars for a basic bike to thousands of dollars for specialized racing bikes. (iii.org)
Overall, rates have stayed between 3.5 % and 4.5 % since 2012, but that range represents a difference of several hundred dollars in the typical monthly payment on a mortgage. (valuepenguin.com)