Poles tend to believe something has irrational value, ergo they try to sell high.
Often they don't understand opportunity cost, that's often the case in small or rural towns. Time and opportunity lost is money.
I agree never buy a second hand car in Poland.
You can buy great used cars in Poland, but of course they are going to be priced at the top of their respective price bands. Those fresh out of leases are generally 3 years old and have been well maintained given they were always owned by the financial institution or loan provider. Given depreciation you can pick up these cars for around half of showroom value or so and still have a great car but for sensible money. Not cheap, more than average, but sensible.