I would think, it depends on whether or not the seller has an asking price in mind. Does the seller really really want to get rid of them or are you pestering him to sell them? Is he an airplane person or not? Not long ago I was told about a modified J-3 in a barn. The owner was deceased and the son wanted to get rid of it. A complete clipped wing airplane with two overhauled engines and no log books. I didn't want it, but offered to help. Rather than me making an offer or suggesting a price, I asked him what he wanted....he said $1000. Well you can imagine how fast it sold. Both he and the buyer were happy.
Another time I was given a Stinson 10A wing....just take it away.