Offer your thoughts or opinion on the input financial query or topic using your financial background.

Double-entry bookkeeping: When selling an asset, does the money come from, Equity or Income?
Selling an asset is not earning income. You are basically moving value from one asset (the laptop) to another (your bank account.) So you reduce the equity that is "value of all my electronics" and you increase the asset that is your bank account. In your case, you never entered the laptop in some category called "value of all my electronics" so you don't have that to make a double-entry against. The temptation is high to call it income as a result. Depending on the reason for all this double-entry book-keeping for personal finances, that may be fine. Or, you can create a category for balancing and use that, and realize the (negative) value of that account doesn't mean much.