OK, I'll explain it again.
Here's what a previous poster wrote:
"another good one is trades welcome but trade value more.
when post an ad ill put it for more than i want but gives negotiating room so i dont screw myself and buyer feels they got a deal cause they got it cheaper then what i "wanted" and everyone wins in my opinion"
OK everyone, there is a PRIME example of why some sellers say "Trade value HIGHER".
Some sellers raise their price "HIGHER" than they want, thinking that the buyer will try to talk them down, and then they get the price they REALLY wanted!
Here's my example:
I listed a nice and clean 1967 Mustang fastback realistically priced at $15,000. A seller on RJ had listed a decent 1964 Falcon that might be worth around $10,000, but he raised his price HIGHER to $15,000 thinking that someone will try to talk him down. He see's my ad for $15,000 and right away he's emailing wanting to do an even trade because he has his listed for $15,000.
So I say there's nothing wrong with saying "Trade Value Higher" for that reason.
This happens all of the time!