[Az-Geocaching] PDA's

[Robert & Linda Smith]

OK, for those of us that are PDA challenged ..  Which one??  I was up on 
eBay and they listed about 13000 PDA's and I don't know one from the 
other..  The first one they listed closed it's auction in 5 minutes at 
$145 for the HP iPAQ 3835/3850   It looked interesting to me, but what 
do I know??  Do most of them expand memory with SD cards like my GPS's??

Bob Smith, Prescott