Advice on seller who “won’t entertain” anything but full price

[Conner Daniel]

I’m in search of some advice to answer a couple of my questions before I go forward with a duplex I am looking at. This place was listed on and off for almost 4 years at the same price and the listing has just been taken down again. I’ve contacted an agent who talked to the seller and they said “they wouldn’t entertain anything below full price.” Is that just a negotiation strategy to try and get full price? It seems that they haven’t gotten many offers at all considering they have had it listed on and off for almost 4 years. So my question is can I still make an offer lower than full price without turning the seller away completely?