"We have approached Netan but he's holding out on offers from League clubs," Bucks coach John Psaras told BBC Radio Shropshire.
The 20-year-old made 27 appearances for Walsall in League One before being released by manager Chris Hutchings.
"The ball is in his court," added Psaras. "We have chatted to him and he knows we're interested, he's a very good player and one we want to watch in action."
The defender has represented England at Under-18 and Under-19 levels during his time with the Saddlers.
The Bucks are also in negotiations to invite former Wolves winger Matt Bailey on trial. During his time at Molineux he had loan spells with Burton Albion and Kidderminster Harriers.
Bennett is on trial at BuryThe Bucks are also keeping a close eye on former Wolves striker Kyle Bennett, who is currently on trial at League Two side Bury.
The Telford-born player started off playing football for Hadley Juniors before being spotted by Wolves. He has spent the last three weeks at Gigg Lane under the watchful eye of manager Alan Knill.
Telford play Prescott Cables on Saturday in a pre-season friendly, with admission to the game free to all supporters.
Source: BBC Sport
Source: BBC Sport