Castro Valley Library Book Sale — Castro Valley, CA

3600 Norbridge Ave, Castro Valley, CA 94546

Dec 5, 2026 – Dec 6, 2026

Castro Valley Library is holding a book sale in Castro Valley, CA. Dates and hours: Saturday 10-4, Sunday 1-4, Preview: Friday 6-8. Special pricing: Sunday $5/bag. Policies: No buyer restrictions, Friends for preview, Bag provided.

While we strive for accuracy in our listings, we can't guarantee that all the information is completely accurate or up to date.

Directions Sale details

Bag Day Profit Calculator

Estimate your cost per book and resale margin before you go.

Bag / Entry Cost ($)

Estimated Books per Bag

Average Estimated Resale Value ($)

Effective Cost Per Book

$0.33/book

Total Estimated Profit Margin

$115.00

Savings vs. ~$17 new retail98%

Estimates only — resale values vary by title, condition, and marketplace fees.