If you have less offices you have less needs for corporate branding. If you were to consolidate all branding into the remaining offices it would take up too much space. You can not be sentimental about this stuff.
They aren't selling it for 25 USD anyway, it's a start price at an auction. I listed my iPad at a $0.01 start price, but that doesn't mean I'm broke and need the penny :)
Throwing them away would be more beneficial.