I live in the Baltimore Area and am interested in trading plants (ask - I might have) for bricks, pavers or rocks.
I'll even help with a little demolition.
There's a current ad in the Lancaster Farming Mailbox classifeds for free stones, dirt, rocks, and slate I believe. Search the Mailbox Ads. This paper is for the Lancaster, PA area.
Here is a link that might be useful: Lancaster Farming Newspaper
Here's the ad. It's on the Web, so it's public already.
Free fill stones concrete dirt, you haul Honey Brook area. Chester Co. 610-273-9177.