I snagged my Hitachi/IBM Travelstar 80 gig from my favorite online retailer Multiwave Direct in California USA for $300 (total with shipping). I could have paid less at newegg or something, but I know and trust Multiwave and have a user account there and everything. The drive came quick and works great along side my 30gig. I haven't tested it in car yet, but songs uploaded just fine. Good luck.
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FireFox31
110gig MKIIa (30+80), Eutronix lights, 32 meg stacked RAM, Filener orange gel lens, Greenlights Lit Buttons green set