OCTFLASH10 Flash Deal 10% off sitewide

For a limited time, use the code OCTFLASH10 to receive a coupon for 10% off item price(s) on one purchase* (single or bundled†) during our flash deal event, starting October 21 at 12:00 AM PDT through October 23 at 11:59 PM PDT. That’s 3 days of savings. But don’t wait, because this offer will be gone in a flash.

*Terms apply. †Bundles that are shipped from Japan are not eligible for this coupon.

Promo details:

Promo code: OCTFLASH10
Redemption period: 10/21/25 12:00 am PDT PDT - 10/23/25 11:59 pm PDT
Hot deal: 10% off item price(s) for one purchase
Use the coupon within 1 day of issuance

How to redeem:

1. Redeem your code

Go to ‘settings’. Click ‘coupons’ and apply the coupon to your wallet. Note: You can only apply the coupon once during the promotional period and it will expire one day from issuance.

2. Use the coupon

Now, get shopping! Once you add an eligible item to your cart, the coupon is applied automatically. Click checkout and you should see your coupon applied before you make the purchase.

Go to coupon page

What's trending:

More ways to save:

Make an offer

Negotiate the price with sellers to get the best deals possible. Many sellers are open to negotiating and you could save even more on your purchase.

Bundle multiple items from the same seller

Bundle it up

Buy multiple items from the same seller to save on shipping and get better deals. Note: Bundles that are shipped from Japan are not eligible for this coupon.

Note: The coupon will only apply to purchases completed while the coupon is active. If you have a pending offer with a seller, consider sending a chat message to encourage them to close the deal before your coupon expires.

Frequently asked questions:

Why do I need to apply the coupon to my account? +

To unlock Flash Deal coupons, you must manually enter the promo code during the promotion window. Once applied to your account, the coupon will appear in your Mercari Wallet and auto-apply to your next eligible purchase.

How long is the coupon valid after I apply it to my account? +

The coupon will expire one (1) day after it’s added to your account. You can track the expiration countdown on your Mercari home tab.

The code can only be applied to your account once, so we recommend adding it just before you're ready to purchase or make an offer to avoid it expiring before use. To avoid surprises, try to complete your purchase soon after applying the coupon.

I'm receiving an error message when applying the promo code. What does it mean? +

"This code has already been used": Any Offers or purchases in progress will claim the coupon – check your existing offers and adjust as necessary. Remember the code can only be used once.
"Coupon code already redeemed. Coupon will auto-apply if eligible": Your 10% off* coupon is in your wallet and available to use on a qualifying purchase.
"This promotion has not started yet. Please try back later.": Check your local time compared to pacific time.

Do items shipped from Japan qualify for the discount? +

Yes, single item purchases from Japan are included in the promotion. However, please note that bundled items shipped from Japan are not eligible for the discount.

Why isn't the code working even though the promo starts today? +

The promotion follows Pacific Daylight Time (PDT). Please check your local time against PDT to ensure the promotion has started in your area. For example:

PDT: 12:00 AM
MDT: 1:00 AM
CDT: 2:00 AM
EDT: 3:00 AM

Can I use the code on more than one purchase? +

No; you can only use it once.

Why won’t the coupon apply to my current offer? +

Coupons can’t be applied to offers made before the coupon was added to your account. If you're waiting on a seller response to a prior offer, the discount won’t apply.

Does the coupon work on pending Offers? +

The coupon will only apply to purchases completed while the coupon is active. If you have a pending offer with a seller, consider sending a chat message to encourage them to close the deal before your coupon expires.

Official terms and conditions: *Between Tuesday 10/21/25 12:00 am PDT and Thursday 10/23/25 11:59 pm PDT (“Promotion Window”), apply promo code OCTFLASH10 to receive a coupon which will be applied to your account for 10% off the item price(s) in a single purchase, excluding taxes and fees. Users are eligible to redeem the promo code one (1) time only. The coupon will expire one (1) day after issuance. Taxes and the Buyer Protection Fee are calculated based on the original item price. The coupon cannot be applied toward bundles that are shipped from Japan (Item Origin: Japan). If a user has their account suspended or limited by Mercari for any reason, including for violating the Mercari Terms of Service, the offer will be revoked and void. The promo code cannot be combined with any other coupons. Offer is not transferable among accounts and may not be duplicated. Mercari reserves the right to update or alter these terms at any time, with or without notice.