Hi Jananne ,

First , let me say I'm sorry for the loss of your Dad , you have my utmost sympathy for your loss .

Second , my best suggestions would be to contact his flying club members , most especially his close friends he flew with and see if any of them will help in establishing a fair price for the items you'll be selling . Another great resource is Ebay , but don't look at the asking prices of items instead look at the "completed sales" to see the prices the items actually sold for . It's likely a lot of it isn't going to be worth huge dollars but it's also likely that there will be some big dollar "collector's items" in the collection that you'll naturally need to know the value of before they're offered for sale . And lastly , speaking of collector's items , you may want to consider keeping a couple or few of your Dad's most favorite pieces just to have a small keepsake of your Dad's love of flying things .

I wish you the best with your estate liquidation and again much condolences for your loss of your Dad .