After complaining about one Amazon MP vendor, I thought I'd put in a "like" for two MP vendors who appear to be very new/small, going by the low number of ratings they've received: hortie1 and safelightmedia. They were two of the three vendors from whom I ordered recordings of Shostakovich 4 over the weekend. Both were shipped Sunday night/Monday, and in my mailbox, stoutly packaged in both cases, on Wednesday by lunchtime. The third one, from blowitoutahere, was shipped at the same time but has not yet landed, but I've ordered enough times from them that I'm not unduly concerned. (Since I ordered "new" and not used, condition was not really relevant.)
Regarding Zoverstocks, while I've never ordered used CDs from them, and not ordered from them that often (and not recently, either), no order has been lost in transit. (In fact, the only two orders with which I've had problems have been AmazonUS itself, and Prestoclassical, and in the case of the latter, the problem turned out to be the local mail, and was no fault of Presto's.) My only complaint with them has been they take up to a week to ship the item and then seem to ship it by slower delivery, so it can take up to two extra weeks to get to me across the Atlantic compared to other UK vendors.