Mobi DB Inventory is a powerful app that can handle complex inventory tasks.
You can quickly add new items, review availability and condition of the items. Add pictures from the gallery or take a photo from the camera. Its possible to sort and filter entries in the list to organize data in a convenient manner, search for necessary items and save database to SD. Ability to scan bar codes is also useful to quickly add new items.
It would be great to get feedback from the community. Your rating on the Play Store would be cool as well.
Just give it a try!