I don't see where the maps are all that expensive. Five years ago, I bought an ADC map of my county for $12. (That's a color book, 10" x 14", about 30 pages, soft bound). Now there's no use comparing paper with a PPC (voice directions -vs- legibility, "Find" feature -vs- index, etc.) But I think that if I wrote to ADC and asked them to sell me all the county maps in the lower 48 states, they might charge me more for shipping than Mapopolis does for all the maps.