at my company the dollars are what they are - take it or leave it. However you can often get an extra week of paid vacation if you ask. You don't eken have to know it is exactly what we can give - the hiring manager wants you and has been told $x by hr but know vacation is an option and will offer it if you just don't say yes instantly.
I would NEVER work for a company where dollars are what they are - that is fucking mcdonald’s and I would in passing tell everyone their employer is either financially insolvent or a sweatshop. jesus!
I think they're doing just fine without you then. Don't seem very sorry either :P
companies will always find slaves, always been that way