I've bought and sold many items on eBay, including drums. I've been involved in over 2300 transactions since year 2000, mostly as a seller. I agree that selling locally is preferred, if you are in an area with a lot of this kind of activity. You can try Craigs, but you can also list on eBay, and state 'local pick-up only, no shipping.' That way, you expose the kit to a wider range than just Craigs, but you aren't commiting yourself to shipping. If someone likes what you have and needs it shipped, they will generally contact you and ask. At that point, you can make a decision. If none of that works, you can always list it again, offering shipping the 2nd time.
I don't know if you are experienced on eBay, but there is a lot to know about it, too much to describe here. If you aren't experienced with it, it would be wise to sell a few lower priced items first, so you can get a feel for it. There are a lot of wacky people out there, it would be good to get some eBay smarts before selling an expensive item.
Now, as far as the shipping, here is my take on it:
How you pack and ship a drum kit depends on how valuable it is. Look at how most of the manufacturers ship their kits. Yamaha, for example will ship a Stage Custom kit in 2 boxes, as guys are describing here. However, they would never ship a Recording Custom kit that way. The higher valued kits are shipped one drum per box. I recommend you follow that example. For me, I would ship a kit that has any significant value that way. If you have a lower valued kit and you want to disassemble and nest it, I would disclose that in the ebay listing so the buyer is not surprised.
As Grunt stated, you want to get boxes that provide space around the drum so you can pad all around the drum. peanuts, bubble wrap, any of that is fine. Make sure you position the drum in its box so that any protruding items are positioned in a corner. For example, tom mounts and bass drum spurs should not be hitting up against a side of the box. They should be in a corner, so there is space to pad. Those are areas which can get hit and damage the shell with any kind of impact, if they are flat against a side of the box.
Extra care needs to be taken with bass drums. Those suffer more damage than others. Besides positioning the drum how I described, I also put more padding in the bottom of a BD shipping carton. I do this simply because, being the biggest and heaviest drum, they get dropped and mishandled more than others. Both BD hoops and shells can crack from impact. Make sure you ship each drum with insurance, tracking and signatures for optimal coverage.