Your mom sounds like a smart & sensible lady. It certainly can't hurt to try... at the very least, for only a couple of hours or days effort, you'll walk away a little more skilled at negotiating... and diplomatic negotiating can get you far in life.
My 1-cent opinion...
PII 266, 512 MB RAM, 10 Gig, 36x CD-ROM, 16x DVD, DeLorme GPS, 5.6" LCD Screen, Dschmidt power controller, Keypower ATX DC-DC Supply, PowerAmp Macro controller, Dauphin mini-Kbd.
Sony Head Unit, Sony Unilink input selector, rear deck Kenwood 6x9's, stock door spkrs... All in my '96 Civic, of course :}