Quoted from Starwriter:I don't think I've ever seen an ebay seller with 4000 100% positive feedback. I wouldn't hesitate for a minute to buy from a seller like that.
I'm at 5000+ with 100% positive. It's possible. I do have a single neutral that will drop off in about a year - but no matter how good a seller you are, there will always be an unreasonable buyer somewhere along the line who expects a ferrari for the price of a cavalier, or personal delivery across the US in 24 hours for 50 cents