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1 for sale now
Every 2020 125 SX that comes off Autotrader, with its final asking price and how long it took to sell.
We haven't seen a 2020 125 SX come off Autotrader since tracking began. Sold prices will show here as soon as one does.
What each 2020 125 SX variant sold for (filled dots) and what the 1 for sale are asking (rings), with monthly medians drawn through them. Click a dot to open the bike.
Solid lines: median sold price per month (3+ sales). Dashed lines: median asking price of bikes currently for sale, by the month they were listed.
By month sold, all variants
How long sold bikes were listed
How many bikes were listed each day since tracking began
Asking price range, with the median marked
Listings added and sold each month
1 live listing from Autotrader · from £4,490 · median £4,490
Sold and asking prices against mileage. Each dot is a bike; click one to open it.
What 2020 KTM 125 SX bikes sell for and how many are on Autotrader UK right now. Updated 20 Oct 2026.
The median asking price for a used 2020 KTM 125 SX on Autotrader UK is £4,490, across 1 bike for sale as of 20 Oct 2026.
There is 1 used 2020 KTM 125 SX bike for sale on Autotrader UK as of 20 Oct 2026.
Autotrender records every KTM 125 SX listing on Autotrader UK twice a day and groups them by registration year. A bike counts as sold when its advert is removed, and its sold price is the final asking price before it came off; days to sell run from the advert's listing date to its removal. Medians are used throughout, and figures are only stated once at least 5 sales have been recorded.
Recomputed after every Autotrader scan. Month-by-month trends across all years: KTM 125 SX market report · About Autotrender