Is this LEGO decal set still collectible?

Yes, as a 2013 accessory from the Gear theme, it holds niche collectible value for specific builders.

What is the condition of the decals?

The facts provided do not specify the condition, but buyers should verify this before purchasing.

This indicates it is a decal set or accessory pack, not a traditional brick-built set.

Name: LEGO Family Window Decals (850794-1)
Brand: LEGO

Gear

Gear · 2013

Theme · GearPieces · 0Set Number · 850794-1Year · 2013

Used

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New / Sealed

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Live on eBay now

Converted from USD at the ECB reference rate — sold comps are US-market sales.

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Is this LEGO decal set still collectible?: Yes, as a 2013 accessory from the Gear theme, it holds niche collectible value for specific builders.
What is the condition of the decals?: The facts provided do not specify the condition, but buyers should verify this before purchasing.
Why is this set listed with 0 pieces?: This indicates it is a decal set or accessory pack, not a traditional brick-built set.