There are programs for ebay. I don't see the point, just put in your maximun bid on the item and you are safe. These programs wait until just moments before the auction ends and then put in your maximun bid.

You have to ask yourself "why?". Ebay will bid for you until the last minute. know what you are willing to pay, put that in on the first day and then wait.

I don't know musical insterments well, but in other areas I see what has to be someone picking up the Harbor Freight or similear catalog, puting something there up, minimun bid what Harbor Frieght wants. Let the buyer beware, there are good deals mixed in there, but you have to know what you are looking at, and what it is worth. Just because someone else is willing to pay more then retail for a potentially used item doesn't mean you should.