When our son was growing up, he would receive Legos for every Christmas and birthday.  He accumulated quite a collection of Bionicles, Knights Kingdom and Star Wars sets.  He has since moved out of state, leaving his collection in large storage tubs in his bedroom.  

When Covid-19 hit, I suggested to my wife that we should  look at consolidating his collection into less tubs.  That is when the giant bags of Bionicle cannisters surfaced from the spare bedroom.  My OCD kicked in and I stated we needed to get the sets into their containers.  With a pile of parts on the dining room table, we commenced building each set, per the instructions, which had all been kept in a safe place.  After the sets were built, I disassembled them, checking the parts against BrickLink's inventories, taking note of what was missing and ordering replacement parts.

After all that was completed, my son said he saw no future for him and his Bionicles, so now they are for sale!

After receiving an order, I will verify the set inventory one more time (OCD), and ship them out within a day or so.