Target audience: Myself. I have some guitars and pedals to sell so I'll write it and use it to sell them. After that I'll try other people who need to sell guitar gear. Why? Because people who sell guitar gear want bigger pictures.

If by "local" you mean craigslist and ebay, you gotta seriously different view of local. I plan on hawking my guitar crap by pointing my twitter followers at the page I make. That'll work for now.

Finally, I plan to have it make a page. Then I'll link to that page off my twitter. Then people who want to buy will email me. And then, I'll sell stuff with it.

I'm thinking, hey, maybe other people would like a way to make a page of pictures of crap they want to sell to point their friends at so their friends of their friends of their friends might buy it.

At least, that's the start.