Last March, the USGS raised the prices on it's 1:24,000 topo maps from $6.85 to $8 and on the 1:100K scale maps from $7 to $9, but AZGS has kept the old prices in place while we sell our current inventory.
But come January, we will have to charge the higher prices as we restock our inventory. So, think about loading up now at last year's prices. And for an added incentive (sales pitch coming...) we are having a holiday sales event with 15% off most AZGS publications and maps.
AZGS is the official Earth Science Information Center partner with USGS for Arizona, carrying over 2,000 topo maps of varying scales for the entire state in our Tucson store.