Do you prefer other brands over Marantz? It’s an honest question--I’m’ not trying to be combative. Are you familiar with this particular preamp?
@kkirk001 I'm not into Home Theatre at this moment of time. If I were to re-constitute my HT system, I would likely go higher end, primarily because I already own higher end amplification units.
@nekoaudio 's advice is sound. Marantz is a solid buy. I actually owned the AV7005. I passed it on to my younger brother, years ago.
My point to take the offer has to do with the value of an offer on hand versus the deal not coming together and then having to go through the cycle again. My post also factored in your being "at the tail end of selling my husband’s estate" and assuming you may want to wrap things up.
If you have a $400 floor, stick with it.
All the best.