I'll throw in another vote for a Thomson Post. Forget the Masterpiece, get the Elite. This is a mountain bike, not a road bike.

$85 will get you one, and since you are a savy eBayer, you'll have money left over for a set of ODI Lock on grips!

I went through 3 or 4 posts before I got a Thomson. Figured I didn't need an expensive one. Well, after spending $30 on the third one, I finally got smart. I've had the Thomson for close to 4 years now, no damage, nothing. Heck, I was sold on the product. Since then, I've probably owned another 4 or 5 and put them on most of my bikes.