If you are selling your tech, especially once it's a year old on the market, you can't expect to just lose 10% under msrp, especially on Craigslist.
eBay is a bit better because a bigger market (nationwide) bids, so you get closer to fair market value. I'd say eBay price IS in fact a perfect market value.
On Craigslist, your market is smaller (limited geographically to your town) and the audience is smaller. Also, the demographics are different. Out of the audience, most Craigslist folks are cheap, some are schemers, and many expect to negotiate down rather than bid up.
As a general rule, eBay price is the average you can hold out for. If going on Craigslist, expect to get less. Also time matters.
If you want to sell your item in a reasonable time frame, you're going to take a bath. If you try to hold out for more money, you may or may not succeed.
If you are like matbook101 trying to get more than it costs in a store new (no one cares about the accessories), you're not going to sell it at all. And even though you may see posts on Craigslist with outrageous prices, doesn't mean anyone is actually BUYING those items.
Matbook101, if you want to sell in a reasonable time frame, price it around $425 or less (maybe $375). Anything above and it may be hard to find a buyer, but it depends on your market, anomalies do happen but it's a risk.
