Hola Chad,
From what I have read, Chile seems easier to buy a bike than Peru. I will be heading down to Santiago, Chile in a couple months to buy a bike and hit the backroads, so thought I would chime in with what I have found around the internet.
There are loads of new and used bikes available for sale in Santiago north of where you are now at. The best site for checking what's available is:
Chileautos: miles de autos y veh�culos nuevos y usados
For people reading this who don't speak Spanish, under vehiculos (Vehicles) you need to press the tipo (type) drop down menu to get to moto (motorcycle). Then press marca (make) drop down menu to get to the brand of motorcycle you are interested in. Then lower on the screen hit the buscar (search) button to see hundreds of choices for the major brands.
In case you haven't read it, a good rundown on buying a new bike in Santiago is at:
BUYING MOTORBIKE - CHILE (2009/2010)
These Polish travelers bought Chinese 150s for about 1500 dollars plus registration and insurance.
Elsewhere on this site I have read positive reviews of the Euromot GXT 200. This bike sells new in Santiago for 999,000 pesos, or about 2000 dollars.
A useful place elsewhere on HU for more info on buying a used bike in Santiago is at:
http://www.horizonsunlimited.com/hub...santiago-45637
I am not travelling two up so am leaning towards buying the Honda CGL125 for 699,000 pesos new, or about 1400.00.
Hondas are easier to sell and have greater resale value than a Chinese bike when you are at the end of your travels in a few months. Here is a link to a young couple of Brits travelling from London to Capetown on a Honda CG125:
London to Cape Town on a 1982 Honda CGL125 | Honda South Africa
People think I'm nuts for riding around the world on small bikes. Let them think what they want. It is better than a bus, hitch-hiking or a bicycle which is all I could afford when I was younger.And many people travel two-up, three-up and even four-up with the little one on the gas tank on little Chinese 125s in third world countries. Is it safe? Of course not. Would a bigger bike be better for travel two up in South America? Sure it would. But I don't have 5000 dollars to buy a used Honda 400 Falcon, much less 10,000 for a new Kawasaki KLR 650, and it doesn't sound like you do either. Bikes are mucho dinero in South America. So I must settle for what I can afford in the 1500 dollar range.
Is riding a bicycle cheaper? Sure it is. But riding a small thumper is way faster. ( Not that it will be fast two up mind you.) But for exploring the backroads and byways and the roads less traveled it will work.
Lucky you are a Kiwi. I believe the national motto when I was travelling down there was, "Like hell I can't". (just kidding)
Hope to see you down the road.
Kindest regards,
John Downs