This thread/post topic line declares the FW to be a .30-06.
As described, it's a $1200 rifle, all day, any day - since the chambering isn't rare, AFAIK.
If it were NIB, which the OP states it isn't, it would be worth well more.
If it was a beater, with extra holes D/T'd, etc - which the OP also doesn't mention as being there, then it would be a $500 gun.
I had a similar situation several years ago with a neighbor of mine, with a different gun at a different value.
I considered my relationship with that neighbor, then told him exactly what I knew it to be worth, and also exactly what I could afford to pay - and left the decision in his hands.
JMO, but that's the only way that both parties will be happy with the outcome.
.