A way to stop accepting donations when goal is met?

In your fundraising plugin, is there a way to stop accepting donations once the goal is met, using the simple donation met?

I'm setting it up as a way to buy things for other people, so once the amount of money required to buy the item (the goal) is met, that item should not be able to accept any more donations.

It would be nice to have an overlay added to the image saying "purchased" or "complete".

Thanks a lot!