I have no actual rare mounts, but I did get my Dreadsteed back when you had to do that quest line to get it. I was quite proud when I got it, and even more pleased when I got back the 250 gold (hard to believe that used to seem like a lot) by helping two guildmates who were mathematically incompetent. I told each of them I would let them use my materials, and that they would only have to pay me 125, splitting the cost between all of us. Neither of them seemed to realize I was making back all of mine with that deal, but whatever. I still saved them gold.