Nice collection.
Being 2nd edition, you will not get the same prices as the OD&D or
1E, because the print runs were much larger.
That said: Dark Sun, Ravenloft and Plancescape usually sell quite well, especially when in the conditions you are advertising your products.
If you want no effort, sell it as one lot on ebay. You could get around 1000USD, maybe more. If you sell everything individually, it could become a lot more. If you want to maximize the value, I'd sell the sealed, Ravenloft, Dark Sun and Planescape individually, and bundle the rest.
Gothic Earth Gazettee, Baba Yaga, Wind Riders, Harbinger House, Planescape MCs could, if you find the right buyer, command 100USD each.