Should I purchase this home with Poly B piping under slab?

Hi. I'm debating if I should proceed with my purchase. We found a house with good quality that was built in 1995. We hired a home inspector and he told us it's not very often to see a 30-year old house maintained so well.
However, this house has poly b pipes connecting the city's water service to this house. There's 4 poly b pipes. All other pipes are copper.
I would really appreciate some insights on this and how hard & costly it is to replace them? Thank you guys.

https://preview.redd.it/gpzi7rwcmxbf1.jpg?width=3072&format=pjpg&auto=webp&s=fbb3ec3e8ab0b634180af0666dee62b771a7ab98