If you're new to the secondhand world, you might be wondering if there's a rule book you're missing out on when it comes to sourcing the best finds and befriending top sellers. However, a large part of being successful while thrifting is simply practicing the proper etiquette while shopping.

Keep reading as three interior designers who are also avid thrifters reveal five of their top etiquette tips that you will want to be sure to embrace as you visit flea markets, make purchases on Facebook Marketplace, and more.

Don't Ghost a Seller

When shopping on Facebook Marketplace or a similar site where pickups are arranged ahead of time, it's important to follow through and show up somewhere—be it at a seller's home or a predetermined public meeting place—at the time you said you would, Kristin Keyes, the founder of Kristin Keyes Interiors, says.

"If for some reason your plans change and you aren't able to make the appointment or you decide the item isn't right for you, let the seller know as soon as possible," the designer says.

Doing so allows the seller to move on to other interested buyers (with popular items, there may be a dozen if not more), she explains. Keyes notes that while backtracking might feel uncomfortable in the moment, it's the more polite route to take versus ghosting entirely.

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Ask Questions Prior to Pickup

Keyes offers another key etiquette tip that also relates to item pickup, and that is to ask all pertinent questions prior to showing up at your seller's home.

"This saves everyone involved time and energy," she says, noting that questions to ask may pertain to size, condition, and payment method.

A little research will go a long way in making the overall experience more pleasant for everyone. Keyes explains how covering all of your bases before you make the effort to see the item is a gift to both the seller and yourself.

Don't Lowball

While bargaining a bit is generally expected when it comes to Facebook Marketplace and similar websites, it's important to respect your seller and not make an offer that is unexpectedly low.

"If you decide to offer a very low price, do so kindly and thoughtfully," Keyes says, while noting that, of course, not every seller will be willing to oblige with your request.

On a similar note, keep in mind that when shopping at a flea market or another venue with vendors, prices may affect the amount of time a seller spent sourcing and researching their finds.

"Keep in mind that it takes time, energy, and experience to bring a good piece to market, so always be respectful," Ksenya Malina, the founder of Time & Place Interiors, says.

She adds that oftentimes, buying more from a given booth may result in a discount on its own, as sellers will oftentimes offer a deal to those buying multiple items at once.

Chat Briefly With the Vendor

It's seen as polite to make brief conversation with vendors as you shop at markets and other venues that encourage interaction between sellers and salespeople, Malina adds. Not sure where to begin?

"Ask about the origin of a piece, or comment on their good eye if you appreciate their aesthetic," Malina says.

Kristin Try, the founder of Kristin Try Interiors, agrees that a little back and forth with a seller can go a long way, noting that getting to know shop owners can pay off—literally.

"A friendly chat can lead to early access to new arrivals or even special pricing," she says.

Respect Items As You Shop

While some flea markets are inherently chaotic environments, it's important to treat items with care as you browse, Try notes.

"Every vintage piece carries a past, and part of the magic is honoring that history," she says. "Be mindful when browsing—ask before handling delicate items, and always return pieces to their original place."