Very sorry to hear that your leaving. I might suggest thinking about it however I do not know your particular situation.
Deans Hobby Stop in Michigan advertises that he buys collections, his contact info is www.deanshobbystop.com, dean@deanshobbystop.com, or by phone 989-720-2137, fax 989-720-0937.
If your looking to recoup value e-bay or similar platform may be a better way to go.
As you may know the open sale of kits is prohibited here on the open forums however there is private messages and e-mail with other interested members that is less regulated.
Good luck and know you will be welcomed back if you choose to return.