New in box small block Magnum heads

I have a pair of new complete ready to bolt on magnum heads. I bought them for a project a few years ago and have no plans for them now. I'm building a bb and want to just sell these to put more cash towards the build. They are aftermarket castings. 1.92/1.60 valves. Heads look nice. Would consider trades depending on the item. Looking for a good core 400 bb engine, 400 block, 440 engine or block, narrowed 8 3/4 housing depending on width and prefer 4 link or ladder bar setup, or possible other trades. Wanting $600 + shipping. Located in Greeneville, Tn 37745 and I can't figure out how to put photos up but if someone will put them on here for me I can email or text the photos. Thanks