hello:
So it's about 100 KM? It's not so near Warsaw then; I guess it's on the east from Warsaw. The value may depend if it's possible to build there and the kind of neighborhood it is. If it's just a farmer land it's not going to be that expensive as a building place (or at least near a shopping center or highway).
I don't know Pacyna (nor Podatkówek - spelling?), but Żychlin is almost exactly 100 km west of Warsaw (Kutno is about 120km) and it lies at the train line Moscow-Warsaw-Poznań-Berlin, also not far from the road Warsaw-Poznań (I can't call it motorway, because it's just one lane in each direction, but still it was the main road on that route for decades), but the new highway goes a different way, I think, more to the south (it goes close to Łódź and then back north-east in the Warsaw direction)