STEEMIT Bidders wishing to place a Bid would be measured on reputation to try and eliminate any false or ghost Bids.
I like the feature. That could be a sticky point if you have new users that don't have the reputation yet.
Since you are asking the question I imagine you have something in the works to make this third party application work.
I am all for it! Excited to see what you are able to create Stephen.
I was thinking about this earlier and was scribbling down a sliding scale. Something like a New User upto $30, and a User with over 70 Rep $500. Something along those lines. On other words let's say a New User has been STEEMIT for 3 weeks, has earned $25 and wants to bid on a second-hand Mountain Bike upto $25, that would be ok..!! Stephen
Already working on this - why am I not surprised?
That scale sounds reasonable - encourages the active people to participate.
Let'a see what the community comes up with.