Values Of Current Finds

Are you asking specifically for error coins?

Yes, Current error coins. I know it takes a while to get them in Cherry Pickers or other publications.

Supply, demand, eye appeal, people have to both know it exists and want it

If you mean a new just listed variety like your 2015 you could list one at high BID price on ebay and ask for offers to see what people offer to get a better gauge of what people will offer over a period of time.

IF you list at X and someone buys it no blink then it worth that or more. if no one buys but six people offer between m-p then you know somewhere between m-p etc.

I understand completely.

I've been trying to do the same with my stuff since my sisters' kids will most likely be left with clearing out my house some day.

Since the values on everything changes with the market and spot prices etc. I've been marking stuff like this:

Silver spot price + some numismatic value
or
Silver spot price
or
Error = some premium value
or
Variety + high numismatic value


I use abreviations and note what I paid, if anything.

I am well aware that for them to get the FULL value would be a big job that they probably don't want, don't have the time for, and then there are storage problems, etc. I just want them to know not to just dump the best stuff for face value.