111SKIN Y Theorem Day Cream NAC Y2

111SKIN Harley St. London · Health & Beauty > Skin Care

111SKIN Y Theorem Day Cream NAC Y2

Era / Decade

2020s (Modern production)

Material

Moisturizing cream in a metallic-finish plastic jar with a silver-tone lid.

Condition

Fair to Good. The jar shows heavy cosmetic scratching and scuffing on the exterior finish. Crucially, the seal is broken and the product appears used/opened.

Demand Level

Moderate (Niche). There is a market for high-end skincare, but many buyers avoid opened products.

Resale Value

Estimated Resale Value

$15.00 - $35.00

Estimated Retail Value

$210.00 - $240.00

Comparable Sales

New/Sealed units sell for $80-$130. Used/Open units of this specific cream typically sell for $20-$40 depending on how much product remains inside.

Description

Authentic 111SKIN Y Theorem Day Cream NAC Y2 (50ml). A high-end luxury moisturizer developed by Dr. Yannis Alexandrides. Features the proprietary NAC Y2 complex designed to repair and hydrate the skin. Metallic purple/burgundy jar with silver screw-top lid.

Key Features

High-end luxury brand recognition; contains NAC Y2 complex; expensive retail price point; dermatologist-developed; cruelty-free.

Authenticity Indicators

High confidence based on font weight, logo alignment, and specific metallic jar coloring. Check the bottom of the jar for a batch code and expiration symbol (PAO - Period After Opening).

Flaws to Note

Significant exterior scratching and wear on the jar. Most importantly, the item is unsealed and used. Resale value for used skincare is significantly lower due to hygiene concerns.

Selling Guide

Where to Sell

Mercari, Poshmark, or eBay. These platforms have active beauty communities, though Mercari is often best for 'open-box' high-end cosmetics.

Selling Tips

Be 100% transparent that the jar is used. Include a photo showing the remaining product inside or state the weight. Use keywords like 'Reparative', 'Luxury Skincare', and 'Anti-Aging'. Clean the lid of fingerprints before photographing. Check the batch code at checkfresh.com to confirm the manufacture date for potential buyers.

Appraised on 7/5/2026