I can’t imagine many people need Special Delivery for an ebay purchase: it starts at £8.15 for just a 100g letter! Recorded Delivery hasn’t existed for years. There is Signed (2nd Class Small Parcel £4.85), but I've been using Tracked 48 for nearly everything (worth more than a few pounds, and where I still have custom postage), and it provides enough tracking for ebay to pay out promptly. The only item I’ve sold with SD so far went by Tracked 48 (and very easily, I found, to my surprise).