How do I flag a trade as NOT POSITIVE without actually reporting the buyer?

[damwar1]

My winning bidder arrived to collect my item and told me she didn't want to pay the winning bid amount (even after having been to view the item prior to auction) . We had even disassembled the furniture for her and loaded it in her vehicle. Ultimately she did pay - but it was not a POSITIVE experience. This doesn't appear to be reportable - but I dont want to leave positive feedback - any suggestions?

[bumps-bargains]

Leave followup to feedback and mention the buyer's ID in the feedback as a flag for other sellers?

Feedback = buyer XXXX arrived on time and paid full amount

Followup = and buyer XXXX tried to negoiate a lower price on collection