Are there any MagSafe Chargers that are save and sold at a reasonable price (or have a better durability then apple's)?
One of the things that has extended the life of my chargers is to be careful when wrapping the wire around the two ears, leave a good bit of slack so that you don't over tighten the charger wire.
This alone has solved most of my issues with my Apple MagSafe Chargers, and I have one that I've had since 2007 that is still in full working condition.
Same applies to any product really, just that Apple seem to be big fans of tiny plugs with very little strain relief.