Perth Glory are set to smash the Australian football transfer record with the impending sale of 17-year-old Daniel De Silva to Italian giants AS Roma that could land the West Australian club up to $2.5 million in transfer fees.

The youngster is on the cusp of sealing a move to the Italian capital that could potentially be worth almost double the previous transfer record set by Rostyn Griffiths' $1.3 million move from Central Coast Mariners to Guangzhou R&F in 2012.

Heading to the Italian capital: Daniel De Silva. Credit:Getty Images

Sources told Fairfax Media that Perth Glory are in the final stages of negotiations with Roma for the sale of De Silva, which could be confirmed this week. It's understood De Silva has agreed to personal terms with the Serie A title contenders and the two clubs are formalising minor details relating to various clauses in the deal.

Perth Glory will likely receive more than $500,000 immediately as part of the deal and could stand to earn up to five times that figure depending on certain clauses such as appearances, performances and on-sale fees. As De Silva is only 17, he will remain in the A-League with Perth Glory for the remainder of this season and next before moving after his 18th birthday in March to commence his career under the guidance of Roma coach Rudi Garcia. It is not yet known if he will then train with Roma's youth or senior team.