Yaris Hybrid - good price for used (UK)?

Wondering what is considered a good price for a used hybrid Yaris? Preferably the years of 2012-2017 for the lower road tax. Scoured facebook market and autotrader, they go for ~£5000-6000 which is a lot more than I thought they'd go for. Anyone here get a bargain on one recently? Interested to know what you paid.

Getting tired of driving a manual mk2. My sister has a 2018 hybrid yaris and I done enough miles in it to know it's well worth the money.