Do you/Did you sell back textbooks in your major?

[AlwaysSAI]

Initially, I didn't sell textbooks pertaining to my major. I kept them thinking that I would, most certainly, use them. But, about 3 years after graduating I realized I hadn't cracked a single one of them, so I quickly put them on ebay.

[adpiucf]

Sell them. They take up space and quickly become obsolete as more current books take their place. If you need reference materials in the future, your employer can order them for you.