I had this a couple of years ago when I sold some Ford Ranger bullbars, they went for over £200 and the buyer paid straight away by Paypal and said he would collect next time he was in the area, after a week or so I e-mailed him and got a reply that he would let me know when he could collect, to cut a long story short after numerous e-mails and checking his ebay account etc and seeing that he was still buying stuff? i left it for a year then re-listed and resold the bullbars, I felt I had gave him more than enough chance to collect and he either couldn't be bothered or didnt want them any more?
Re-sold the bars and never heard anything else form the original winner....

Steve