This is one of my best seller on unreal marketplace:
Door/Treasure Chests Sound Effects Pack
A lot of games need to open a door or a treasure chest! 
In this pack you will find a collection of 88 sound effects (recorded dry, with no effects such as reverb, etc), including:
- creak / squeak door close/open (ideal for horror / suspense settings)
- close
- key lock / latch
- handling open / close
Find the demo of the whole collection here
I am always thinking about some upgrade to this pack. What do you think i should record? what does a pack like missing? which are your needs?