I used adbrite for cheap PPC ads, I had 2000/hops and only 1 sale. The promoting page wasn't that bad. 130/1 is really by my experience nothing to worry about. Nowadays I convert about 1/150.
I have had strong sales for the last week.. then today i only made less than half of the average daily sales. Today i had the same about of clicks on adwords but less sales. I guess it was just one of those days. its not the same people coming to the site everytime. so i expect this to happen.
Got to tell you guys, I'm back on the track! After I bought through my own link my sales have been flying in! Hope it keeps this way