A thought to share - take it or leave it, only my thought. Asking for an estimate and for a buyer in the same message is putting you at a huge disavantage - if I tell you its worth nothing - then offer to buy it cheap - you are in a bad "sales position".
Sorry, just want to help - you may edit your post - and put your name in the make an offer section and see if you get a bite.
hope that helps/