A cache of Dallas history, some possibly valuable, some definitely not, is up for sale: Thousands of items from Old City Park, a village of vintage buildings near downtown Dallas, are being sold at an estate sale starting Monday, April 29.

The sale, which runs from April 29-May 4, from 10 am-4 pm, comes in response to a changing of the guard: For more than 50 years, Old City Park has been managed by Dallas County Heritage Society, but Dallas' Park and Recreation Department will take over management in May.

Items for sale may include some historically significant artifacts, but according to a letter posted on Old City Park's website by Heritage Society interim CEO Mark Meadows, many have already been donated to other museums.

"Because the Park will no longer operate as a museum, DCHS has a professional obligation to follow best practices in the disposition of our collection," the letter says. "Historically significant artifacts have been offered to other museums, libraries, and other non-profit organizations that will preserve these items and use them for educational purposes, so that these artifacts can continue to serve the purpose for which they were donated or otherwise acquired."

The remaining items not collected by other institutions are what is up for sale to the public. Items in the sale include large furniture, small collectibles, and even a pickup truck.

According to a FAQ on their website, items will be sold at full price from Monday–Wednesday, with a 25 percent discount Thursday–Friday, and a 50 percent discount on Saturday.

Proceeds will be used for future repairs and other improvements to the historic buildings and grounds of Old City Park.

Located at 1515 S. Harwood St., Old City Park has existed as a museum of architectural and cultural history located on 14 acres immediately south of downtown Dallas. It's been home to 37 structures, mostly from the 19th century dating between 1840 and 1910, that have been moved into the park from throughout northern Central Texas, including a dog-run house, a Greek Revival mansion, two Queen Anne houses, and a shotgun house. A bank, a print shop, and a general store represent turn-of-the-century commercial structures, and the park includes a church, a country school, a train depot, and a drummers' hotel.

The site has served as an open-air museum and event space, and an occasional destination for field trips.

"For more than fifty years, Dallas County Heritage Society has managed and operated Old City Park as a living history museum dedicated to sharing the stories of the individuals and families that lived in Dallas in its early years," the letter says. "Thanks to our incredible team of staff and volunteers, and through the items we collected and purchased to furnish and decorate every historic structure at Old City Park, we helped connect area residents and out of town guests with life in Dallas between 1840-1910."

The park switches over to city management on May 26.