@vitalproperty,
digital*ghost raises an important point - well, a few important points, particularly in respect of the difficulty in getting eBay to remove negative feedback on the basis of a claim that feedback extortion was occurring.
A look at the feedback that you have given your sellers shows some things that may lead eBay to consider you a high-risk buyer who violates policy.
You've violated policy more than once in giving your own buyers a negative feedback comment with a red positive dot (as sellers have not been able to give negative feedback to their buyers since 2008). You've referred to one of your buyers as a "mongrel".
SOLUTION: Just open an Unpaid Item Case if buyers don't pay, and don't give them any feedback. Unless you can give a positive comment, don't issue any buyer with a green dot.
Some of your most recent negative feedbacks given to sellers indicates that you've been disappointed by poor quality items and fakes from Chinese sellers. You certainly shouldn't have to put up with fakes and sub-standard items. You have the right to receive fit-for-purpose purchases. And of course you have the right to leave a negative if the transaction warrants it. However, if you buy risky items (that is, items from Chinese sellers who sell knock-offs, especially when you want genuine items made with materials that are to standard, when you're not paying the price of the genuine items' RRP here in Australia), you need to assume some of the consequences for those purchases yourself, rather than expect eBay or PayPal to be your safety net for ever. (eBay and PayPal do have some protocols in place with regard to buyer behaviour, especially if their attention is drawn to a buyer. Having been given that warning about being in breach of policy means you are now on eBay's radar. One of the consequences may be that eBay Money Back Guarantee could be limited or cancelled, and ditto with your PayPal Buyer Protection. I mention that as a possibility; you can read this in eBay's MBG page.)
SOLUTION: Make better buying chioces. Click onto the seller's feedback score which links to seller's feedback profile page where it will state where the seller is registered. If seller is in China, etc., just exercise some due vigilance. Check the seller's negative feedback to see if there's a trend in the comments about items being fake or coming from China. Just by doing these two things, you'll be a much more informed buyer with an appreciation that what looked like a good deal may very well turn sour, so it would be best to look elsewhere.
With regard to the instances where you have clearly been refunded in exchange for revised feedback, you should read eBay's policy on feedback. You're not permitted to threaten negative feedback to force a refund, return or replacement that isn't covered in the listing or eBay's MBG. Also... going back to 2011, there are indications that you want refunds or replacements without returning the original item. (E.G., earliest example in October 2011 has the seller replying to you "We would gladly exchange or refund, but you need to send them back first!!" - and subsequent replies in some of your later feedback indicate the same issue.)
SOLUTION: Apart from making better informed buying choices (so that you avoid problem purchases in the first place), just contact sellers if there is a problem. However, โโโโ follow a new regime in terms of contacting sellers with a problem. You may want a full refund without returning the item that you consider isn't as described, but that's not how it works. You should read eBay's policies, in particular the eBay Money Back Guarantee policy. If you cannot negotiate a fair remedy through contacting the seller, then use the Resolution Centre process. You are required to request a return if you want a refund; the seller can offer you either a replacement or a refund upon receiving the returned item. โโโโDon't, whatever you do, use feedback as a tool for compelling a seller into a refund or replacement, and especially not if you're refusing to send back the original item.
Some of the feedback you've given does seem unfair; you had buyer's remorse over finding the item cheaper elsewhere, and gave the seller a neutral on account of that. If you're unhappy post-sale when you KNEW the conditions of the sale and those conditions haven't changed, a negative or a neutral are (in my opinion) unfair. eBay's feedback pages state that your feedback must be fair and factual, and must be in relation to your transaction with the seller. Giving a neutral or a negative because you paid a higher price for an item that you could have bought more cheaply elsewhere but the cheaper one wouldn't have arrived in time is not a fair use of feedback, and sellers can contact eBay in such instances to have the feedback removed; it would almost certainly go on your record.
SOLUTION: Do your research beforehand. Don't buy until you're satisfied that you're happy to go ahead with the purchase. If you buy knowing that you're going to give a negative or neutral, that could conceivably be seen as feedback manipulation - which is covered in another eBay policy. You've got so many choices as a buyer; buy wisely. And... I wish you very happy and safe buying for the future.
