If you have multiple boxes of baseball cards collecting dust in your attic or basement, there are several options you may want to consider for what to do with them. First, you’ll want to assess the condition and value of the cards. Carefully go through each box and remove any cards that are in poor condition due to damage, stains, creases or other defects. For the remaining cards in good condition, you can do some research online to get an idea of their potential value. Look up cards of star players, especially ones from earlier decades like the 1950s-1980s, as those tend to hold more value as collectibles today.

With an idea of what you have and their estimated worth, your options include selling the full collection, picking out valuable individual cards to sell, or holding onto them long-term. If you choose to sell, the method will differ based on the target buyer and estimated value. For common cards or those only worth a few dollars each, your best bet is likely selling them in bulk locally via online classifieds sites like Facebook Marketplace. Post detailed photos of sample cards and provide an estimate of how many are included. Ask a fair price per 1000 cards. Meet buyers in a public place like a police station parking lot for the transaction.

Higher value vintage cards may have a national or even international buyer base. In that case, create a seller account on online auction sites like eBay to list individual valuable cards. Thoroughly research “sold” listing prices to determine fair starting bids. Take crisp photos showing the front and back of each card without glare or fingerprints. Clearly describe the condition using standard grading terms. Carefully package items and ship with tracking. PayPal or eBay’s seller protection programs offer security. Shipping costs will cut into profits, so consider selling multiple cards to one buyer to reduce this.

Another platform for showcasing and selling select rare vintage cards is through online collectibles dealers and auction houses. Search their websites for processes to submit cards for potential consignment. You’ll send high-res photos and details up front, with the company charging a commission only if the card actually sells at their scheduled auction. This option provides exposure to serious collectors but takes time and you lose a portion of profits.

Rather than immediately liquidating all your cards, it may be wise to spend the time sorting and researching more thoroughly first. You could discover a valuable gem that increases greatly in worth by simply holding it long-term. Grading services can also professionally assess condition and give slabs cards protection, potentially multiplying their value. But this service costs money up front with no guaranteed return.

For cards of specific players you admired growing up or sets you enjoyed putting together, consider keeping your favorites for a personal collection. Properly store them in new protective sleeves and binders kept in a cool, dry place away from damp or heat sources. Displaying a curated collection can become a treasured hobby. Just be sure not to consume too much space in your home for cards unlikely to increase in worth.

With patience and diligence, boxes of childhood baseball cards gathering dust need not end up in the trash. Taking time to sort, research values, showcase highlights, and sell strategically provides the best chance to transform a nostalgic collection into cash – or recapture some of the joy they once brought as a refined personal archive. With low effort options for bulk sales locally to higher-end consignments, there are opportunities for collectors both casual and dedicated.