I was speaking more in general about the concept of haggling, which I think Bass12 was too. He was stating that haggling, in itself, seemed like generally a cheap and dishonorable practice, ...although not always. I respectfully disagree with that position. I think that haggling is generally a useful negotiation practice that facilitates more trade through fair compromise. We need to practice the art of compromise more in society because we seem to be becoming more polarized and dismissive of other people and their positions whether those positions are financial, political, spiritual or whatever. (Naturally, we can't discuss those last few things here, but hopefully we all recognize the phenomenon)
In this specific case, I think both the buyer and seller have made faux pas in the negotiation process. Initially the seller was demonstrating good faith by honoring his unintentional discount. The buyer agreed and then made a bad faith re-negotiation and attempted to manipulate the deal by lying. The seller was justified in his response, however I feel his response was immature and an overreaction. Thus my previous point that haggling is a lost art.
I think the art of negotiation has a lot of merit and is a valuable and honorable skill. Also it is a useful tool for starving musicians with bigger dreams than wallets.