Craigslist is not firearms friendly.
Ebay has loading stuff, including presses all the time, but their prices are pretty high. Few bargains to be found.
I have found local shooting sports forums to be a good source of stuff, but as you have found, few presses offered.
This forum has a buy and sell stuff section
I found a few moderately good deals at garage sales.
Can't think of anything more right now.