Test cricketer Glenn McGrath said he was disappointed with the behaviour of the man trying to sell his mother's private letters.

But McGrath, who returned to Sydney on Wednesday night from the Ashes tour of England, said he was happy with the way police dealt with the matter.

Letters from 1993 from Bev McGrath to former friend and confidant Peter Amiet were on sale on internet auction site eBay but were withdrawn.

Acting on a complaint from McGrath's manager Warren Craig, police investigated Mr Amiet's attempt to auction Mrs McGrath's personal letters at a starting price of $15,000.

Mr Amiet approached Mr Craig four to five weeks ago with a first option offer to buy the letters, before trying to sell them on the internet.

"I guess it is disappointing that there are people out there that would do it," McGrath said.

But McGrath said he did not think there was anything "damaging" about him in the letters, and that the incident had not interfered with his performance for the Australian team in England.

He had not yet spoken to his mother about the matter.

"It's a personal thing that she did and that's the way I prefer to leave it," McGrath said.

Mr Amiet said he decided against telling Mrs McGrath about the sale of the letters because "I knew straight away that she wouldn't want them released".

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