45 Dollar touring bike. 5 days across the Mekong Delta. No problems at all until I broke the chain on what was last day I could bike tour anyway. Got a ride into town holding the bike on the back of a motorbike. Sold it for $15. Got the boat/bus back to Saigon to meet up with a friend and travel as a normal backpacker for the rest of my trip.
Don't let your wanderlust get translated into consumerism.