Resale value of EUC Baby Beehinds Magicalls?

Not sure if this is the right place to post but I have 4 Magicalls in EUC that I want to part trade with someone for something else, trouble is I have no idea what value to put on them All bought new by me over the Summer and in EUC no staining etc

Any ideas?

TIA

Can you look on google or test it out on the classifieds. What were they new? Can you kind of guess from that or just post a price and if people think it's a lot they will say, happens all the time; people are good on here and understand that asking for a certain price can be confusing sometimes.