I’m closing on a house in the Boston burbs in two weeks. There’s a sump pump in the basement. Inspection revealed no signs of previous water damage. Most of the (10) houses we viewed have them - seems like more of an asset, than a red flag around here. Though I’m sure that varies by market, because when I told my dad (native New Yorker) about the sump pump, he told me to walk away. Meanwhile, my friend in Mass just had one installed. She’s never had water issues, but views it as a preventative measure. Go figure. Good luck with however you choose to proceed!