YAET: possible to reduce a proxy bid?

[Yossarian]

let's say I bid 20. I'm the current high bidder at 10. is there any way to reduce my max bid to 10?

 

[amol]

no

 

[RossMAN]

http://pages.ebay.com/help/buy/questions/retract-bid.html

 

[Yossarian]

I asked the guy to cancel my bid but I don't know if he will. the thing is, I was outbid on another of the same item so I bid on this one. then the guy who outbid me retracted his bid, putting me on top again. unfortunately I had already bid on this second item.