The midfielder was on the cusp of a move to Newcastle in the summer, but decided to stay at Het Kasteel for another season after former Dutch national coach Frank Rijkaard took the reins.
Sparta have had a disappointing campaign, with relegation still a possibility, and their three million Euro debt has forced them to offer their brightest talents, namely Mendes da Silva and Nourdin Boukhari, to interested clubs.
Edward Burleson, who represents Mendes da Silva, has confirmed that financial trouble at Sparta prompted the decision to sell the teenager.
"Yes this is true," said Burleson when asked if money was behind the decision.
The Magpies lodged a bid last term, and may resurrect their interest as Sparta`s current plight has led them to set a price lower than what they were offered last season.
"Obviously, last summer they (Newcastle) wanted him, but since then they have brought a couple of players in, so we will have to see what happens," he added.
"The fee Sparta are looking for is lower than what was offered last year."
The player`s agent has confirmed to planetfootball that his charge would favour a summer move to England, although he would consider Spanish football.
"He is looking to England first, but he would also consider Spain."
A new challenge seems to appeal to the player, with Rijkaard not making the impact he expected.
Burleson added: "He was happy to stay last year because Rijkaard took charge, but he is now ready to move on."
Ajax also expressed an interest in the wide-man last term, and they could rival Toon boss Bobby Robson if he decides to resurrect his interest in the 19-year-old.
Another player on his way out of Sparta is Anders Nielsen and he is set to take a trial at De Graafschap.
The Danish midfielder is one of many who have been informed by Rijkaard that they will not be required in Rotterdam next term, and his representatives have secured a trial at De Graaf.
Nielsen has played 256 professional games, scoring 31 goals, and will be looking to secure a move in the near future.
