Craigslist is a popular online classifieds platform where you can find a wide range of used items, including office furniture. Visit the Boulder Craigslist website and browse the furniture section or search specifically for office furniture.

Facebook Marketplace is another online marketplace where you can buy and sell used items, including office furniture. You can filter your search by location to find listings in Boulder and surrounding areas.

Nextdoor is a neighborhood-based social networking platform where you can connect with people in your local community. Check the For Sale & Free section to see if anyone is selling office furniture in Boulder.

OfferUp is a mobile app and website that allows users to buy and sell used items locally. You can search for office furniture listings in Boulder and nearby areas and communicate with sellers through the app.

Letgo is another online marketplace where you can find second-hand office furniture for sale in Boulder. Browse listings or use the search function to find specific items you’re interested in.

Some furniture resale shops in Boulder may have an online presence where they list their inventory. Search for these shops online and visit their websites or social media pages to see if they have any office furniture available.

Websites like eBay also have listings for used office furniture. You can search for items specifically in the Boulder area or filter results by distance to find local sellers.

Explore other classified ads websites that cater to the Boulder area. Look for sections dedicated to furniture or office equipment to find listings for second-hand office furniture.