Hi there,
Thank you for your inquiry,
There is no set amount, if you wish to make a donation, that is totally up to you, as little or as much as you feel, actually as a moderator we don't see this information, so I don't really know my self what is usually donated, you are welcome to contact 2carpros direct if you need more information.
Mark (mhpautos)
Thursday, December 3rd, 2009 AT 3:17 PM