craigslist
No.
Craigslist is an online ad site.
You must set up an account with Craigslist-it's free! Make sure your ad is catchy and correctly written, describing your vehicle and the condition it is in and the price you want. Place ad on Craigslist in state and area you live, along with contact details.
They don't allow it.
Yes
If the ad is looking for a relationship, yes.
Craigslist is a great place to advertise!
Craigslist costs about ten dollars to put up an ad. You must give a credit card or use a gift card in order to pay for the ad that you will be placing on that website.
If ad publisher don't provide his or her tel #, e-mail or or means of direct contact, then the only way is to contact through craigslist.
The process to place an ad targeted towards the Portland area is rather simple. Browsing to Craigslist, select the state that has Portland in it, Oregon. Then click on the city, Portland. Head to the "Post To Classifieds" button and fill out the form like any normal Craigslist ad.
For the most part your competition can flag you. If not, you will be flag by the mechanism provided by Craigslist anti spam filters.