Just bid and win on all the stock he has mate.
Then leave negative feedback straight away, tell him you will remove the feedback once he's sent you what you originally ordered.
Sellers can no longer leave negative feedback for buyers so you've no worries there.
All the seller has to do is report the neg and any email and he will get it removed and a good chance red may lose his account
Bid on his items but don't pay worse that will happen is unpaid item strike on your account but you wont lose account from it . but a lot of sellers set a max of 3 unpaid strikes then you can not bid on there items I know I have mine set that way