Don't buy those cheap safes - they are not good at handling moisture and are not made for gun storage.
I researched all of those mini pistol safes to find 1 to put by my bed. I have read complaints about the bio metric ones being noise and/or slow.
Get the one named "GunVault." U can find the standard one for less than $100, or the GunVault Deluxe for about $115. I got the Deluxe because it also has a built in motion alarm, a light inside, and U can tell if someone has been tampering with the combination, trying to guess. Since I bought it as a child proof thing, I wanted those features.
They make a standard size and a tall one, so with the combination of the regular gun vault, the gun vault deluxe, and the 2 sizes, there are 4 models to choose from.
I have been happy with it.
If U just want the regular Gunvault, some stores even sell them - like Academy Sports.