Upload & Sell: On
I wrote that last response before completing the thread to this point, so I'd like to add a little more.
Paul -- You are an awful buyer.
I buy (and sell) a lot of items here and on ebay. I know very well how to hedge my bets and take chances. Mostly this has paid off very well for me some really great deals and great associations with buyers and sellers.
First point -- within hours of the delivery of the item to my house, I have tested it, and usually in multiple scenarios (multiple bodies, or multiple lenses on body). Carsten teases me about how much I shoot my backyard, and the inside of my house! I know immediately if there is a problem or not. If I find a problem, I contact the seller. A solution is worked out, somewhere between sending the item back for refund, or occasionally me undertaking repair at my own time/expense and simply notifying the seller of the matter. I never, ever, let a piece of equipment go waiting to test. I would never, ever have an expectation of recourse if I didn't contact the seller within a week to notify of a problem. Your failure is unconscionable.
To give you an idea: I bought a 1D3 and 1Ds3 in recent months from reputable buyers here. Both needed AF repair that was undetected by the previous owners. I sent them to Canon (being CPS member) and got them taken care of myself, and now have beautifully operating units. (In both cases, I was using in One Shot, the previous owners were using AI Servo, which worked fine!). I had gotten a great deal on both, so had goodwill toward the sellers already! No harm, no foul, no complaint of ethics. Another: I just got a used 17 TS-E lens on eBay that wouldn't focus, having suffered a bang by UPS. I contacted seller and arranged to send in for repair myself, carrying the repair charges until the seller repaid me (as agreed). Again -- I knew within an hour of delivery that there was a problem (actually I photographed the damaged box before opening), took care of the matter, and kept in good contact with the seller. I had gotten a great deal on the lens too.
On quick examination, your photos look "okay". Not great, but not glaringly bad. Since you didn't do your due diligence, you should repair (at your own expense, or try twisting Sony's arm) before you sell the lens, or you might reconsider keeping it if suits your needs after repair. Stop the revenge ploy against the seller and suck it up. Sorry for the inconvenience and the loss, but that happens sometimes, especially with used gear.
Everybody -- No, I'm not the seller! And I don't know who it is either.