Note: I'm not affiliated with this app, just a fan.
If you're rich enough that you can still afford your iPhone but also feeling strapped for cash or just wanting to unload a few items without the hassles of eBay, Craigslist or a yard sale, try Thirsty Pocket
(opens in iTunes). It's free, there's no subscription required, and it can get a photo listing of your item posted in about a minute. Plus, it takes standard precautions to protect your identity and personal info until you contact the buyer.
Albuquerque and surrounding areas are severely underrepresented with just one ad listed at the time of this post (2004 Saturn Ion, anyone?), but it looks like there's great potential for a no-hassles, local marketplace with this app.
SHOE ALERT: My gf has a couple of bags of size 5, 3" heels destined originally for Goodwill, but I think I'm going to try Thirsty Pocket first.