Carey Group (CG) does not sell to resellers except under limited circumstances. One of those circumstances is if you want to purchase a CG product but can only purchase from a certified vendor, which, in this circumstance, CG is not but the reseller (e.g., a company that supports your agency) is.
For your information, CG’s product pricing doesn’t change. That is, CG receives the full, regular purchase price when it sells to a reseller. Note, however, that normally resellers have a standard markup, so the price you pay through the reseller may be higher than the price you would pay if you purchased from CG directly.