I'll start this thread off with a busted motor shaft on my Hacker A60-16M motor. Due to a full throttle flight 6 feet off the ground, and getting hit by a downdraft in very windy conditions, the model suddenly lost all 6 feet of altitude. The prop hit the ground, the Hacker A60 motor shaft broke off.
So, I called the Aeromodelers (Hacker) in Arizona, described what I needed. Yup, they had it in stock for $19.98 each, along with a flat rate shipping charge of $4.95 for two day delivery. I ordered and got two replacement shafts in two days from the phone call.
$4.95 is the Postal charge for second day delivery. Aeromodelers didn't add the usual "Handling Charge" to their order.