Saw this on Ebay this morning. I am not associated with the seller nor do I know them. If I had this collection I would sell the Neil Cost calls individually and the others in lots or three or so.
https://www.ebay.com/itm/235123580466?_trkparms=amclksrc%3DITM%26aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160811114145%26meid%3D75d1021f503c47cb8f07e67e806bb78d%26pid%3D100667%26rk%3D1%26rkt%3D8%26sd%3D235123580466%26itm%3D235123580466%26pmt%3D0%26noa%3D1%26pg%3D2351460%26brand%3DQuaker&_trksid=p2351460.c100667.m2042
They do have a very nice collection of calls,
I wonder if this is a sale following the death of the owner. Agree, that the Cost calls should be marketed separately to get the best price.
They seem to be doing OK with it as a group. $6500 is a lot of money for turkey calls.
Someone did their homework and priced it about what they are worth retail .