Suggestion: Increase the deposit/withdraw values.
1 - no change
5 - 50 or 500
10 - 10,000
50 - 50,000
Reasoning: This feature is primarily used for stackable items, the low values make it a pain in the arse to deposit/withdraw large quantities.
-Spyder
edit - 50 or 500
I'm thinking 50 would be a better option. Having 1 and 50 would cater to smaller withdraw/deposit amounts and 10k/50k would cater to larger.