Help determining an approximate value of bedroom furniture?

[bcboggsiii]

I have a matched set of bedroom furniture that was my grandmother's and am trying to sell them at a fair price. I have no idea if they are worth anything or not. I believe that they are from the late 80s or early 90s. The pieces are all wood, I believe red oak. They include a long 8 drawer dresser with attached mirror, a 5 drawer dresser, and a full size Headboard and bed frame. Manufacturer is unknown and I'm not sure how to find this information. All pieces are in very good shape, all drawers function properly, very few scratches. I'm moving soon and just want to know how much I should ask for them so that I can get a fair price. Any help would be greatly appreciated!