Determine the value of a Volvo 240 DL bj 91

Hello I’m new here in the forum and have the following concerns. We have inherited a Volo T244. now it’s about selling the car… after a little information the pricing seems to me very difficult. There you find T 244 from 2000 to 15000 € Here a few informations about the car Volvo T 244 First registration 30.4.91 -> one of the last vehicles in D. as far as I have read the correct petrol with 85 KW / 116 hp mileage 380 000 km 1st hand – inherited car stood almost always in the barn. Older Mr. Auto TÜV without reperatures in autumn 2013 get without complaints. External and internal condition is orderly and good I hope you can help me a little. To assess the value of a Bish better With kind regards Chr.