Gardena 15021-20 machine auction prices

As of 7 November 2026, hammerhistory.com has recorded 9 auction sales of the Gardena 15021-20 machine with a published hammer price, closed on 25 October 2026, on 1 auction site. One sale is free to read: a Gardena 15021-20 machine sold for EUR 10 on 25 October 2026.

Known model 9 sold with a price 0 at auction now 9 seen at auction

All sales 9

Sold	Built	Hours	Auction house	Place	Photos	Hammer price
2026-10-25 Gardena - 15021-20 - ZoneProtect for SILENO robotic lawnmowers	unknown	unknown	troostwijkauctions.com	Valkenswaard	2	EUR 10 FREE
2026-10-25 Gardena - 15021-20 - ZoneProtect for SILENO robotic lawnmowers (2x)	unknown	unknown	troostwijkauctions.com	Valkenswaard	3	EUR 15 FREE
2026-10-25 Gardena - 15021-20 - ZoneProtect for SILENO robotic lawnmowers (3x)	unknown	unknown	troostwijkauctions.com	Valkenswaard	3	EUR 15 FREE
2026-10-25 Gardena - 15021-20 - ZoneProtect for SILENO robotic lawnmowers	unknown	unknown	troostwijkauctions.com	Valkenswaard	2	EUR 5 FREE
2026-10-25 Gardena - 15021-20 - ZoneProtect for SILENO robotic lawnmowers	unknown	unknown	troostwijkauctions.com	Valkenswaard	2	EUR 5 FREE
2026-10-25 Gardena - 15021-20 - ZoneProtect for SILENO robotic lawnmowers (2x)	unknown	unknown	troostwijkauctions.com	Valkenswaard	3	EUR 10 FREE
2026-10-25 Gardena - 15021-20 - ZoneProtect for SILENO robotic lawnmowers (2x)	unknown	unknown	troostwijkauctions.com	Valkenswaard	3	EUR 20 FREE
2026-10-25 Gardena - 15021-20 - ZoneProtect for SILENO robotic lawnmowers (3x)	unknown	unknown	troostwijkauctions.com	Valkenswaard	3	EUR 15 FREE
2026-10-25 Gardena - 15021-20 - ZoneProtect for SILENO robotic lawnmowers (3x)	unknown	unknown	troostwijkauctions.com	Valkenswaard	3	EUR 15 FREE

Click a sale to see that machine with its photos and details. A hammer price under EUR 100 is free to read.

More Gardena models

Gardena Smart SILENO FREE 120061 sold Gardena Smart SILENO max 120041 sold Gardena Smart SILENO MAX 100029 sold Gardena Smart SILENO FREE 70020 sold Gardena Smart SILENO pro 60020 sold Gardena Smart SILENO pro 40019 sold Gardena Smart SILENO free 100017 sold Gardena Smart SILENO free 80011 sold Gardena Smart SILENO max 15009 sold · 2 open Gardena Smart SILENO FREE 15009 sold Gardena Smart SILENO free 6508 sold Gardena 4088-607 sold

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Gardena 15021-20

Garden and grounds machines

The Gardena 15021-20 ZoneProtect is an accessory module for Gardena Sileno robotic lawnmowers. It allows the mower to safely cross narrow passages or separate garden zones without needing a wire loop around each area, using a small signal transmitter. It is used alongside compatible Sileno models to extend their mowing range into divided or awkwardly shaped gardens.

We recognise this model across the auction sites and keep every one we see together.

On a used one

Check that the unit is genuinely compatible with the specific Sileno model generation, that the housing and cable connections are intact, and that it powers up and pairs correctly with the mower.

About Gardena

Gardena is a German manufacturer of garden and grounds equipment, founded in Ulm and known worldwide for watering systems, hand tools and robotic lawnmowers sold under the Smart SILENO range. It also supplies related irrigation and connection components. The brand is part of the Husqvarna Group.

Founded 1961 · Ulm, Germany · Part of Husqvarna Group

All Gardena models

9sold with a price

0at auction now

1auction sites

0countries

sold, price lockedfree to read

Questions about Gardena 15021-20 auction prices

How many Gardena 15021-20 auction sales are on record?

9 sales with a published hammer price, closed on 25 October 2026, on 1 auction site in 0 countries. 0 more closed without a sale.

Is a Gardena 15021-20 at auction now?

Not at the moment. The lots of this model that come to auction appear on this page while they are open, and every sale that closes with a price is added to the table.

Are the Gardena 15021-20 hammer prices free to read?

The oldest sale of every model is free to read, and so is every hammer price under the site's floor. Every other hammer price opens with an account, one sale at a time.

Hammer prices are what the auction house recorded when the lot closed, before the buyer's premium, in the currency of the sale. A sale listed on a house's own site and on its platform counts once. Doubt a figure? Open the sale and its listing is linked there. How prices are recorded.