So my 85W Magsafe "T" charger recently broke (the plastic on the wire near the charger block melted and it must have done something to the connection), and I'm looking to buy a relatively cheap 85W Charger (under 50 dollars including shipping). I've found several used on Amazon, from sellers that seem to have very high ratings, but I don't know whether I should order one or not. The last thing I want is for it to come and the charger to be defective and/or not work at all, or even worse, cause an electrical fire and burn down my house. However, I'm not keen on shelling out 80-ish dollars for one directly from Apple unless that's my only option. Does anyone have experience buying used chargers from Amazon, or can provide some wisdom regarding this issue? Thank you very much.