I bought, in my early days, what I thought was a Gillette Debutante (probably before I knew of the fantastic mr-razor site). It was about £15 I think. The handle was a ball end Tech and the base plate was something that looked like an Edwin Jagger and the head said Velvet! It sort of fitted together ok but when I added a blade it wouldn't screw shut. The case was near immaculate which was the only reason I didn't send it back (maybe a bit odd but the inside looked almost mint and the outside pretty good as well).
Recently bought some yellowed but cellophane-wrapped English Wilkies. Although sealed it wasn't a waterproof one. Most were corroded badly; some on the blade edges and some not, but I'm not sure I want to risk the few that looked like the edges were ok.
Been a few razor disappointments too but not because they were damaged or mis-described, just didn't suit me. Probably the most disappointing recent acquisition (although not expensive) was my WS Sticky. Nice razor but far too mild for me. A few of the most beautiful razors, like the No. 66 Aristocrat and the 58, just feel draggy and not particularly close at any angle. The 58 was a very kind lend from Dodgy but I paid £60 for the 66. I hung on to that for ages as I fixed the lazy door myself using French Blade's help and wanted to make it work for me. It had a tiny bit of plate loss near the nob and some light scratches to the head but was otherwise excellent. I planned, and did, used it on my wedding day with a Super Iridium.
I ended up getting my money back even though I thought it'd go for much more. If I'd had a spare Gillette case - not necessarily the right one - at that time and stuck some Gillette Blues with it, and advertised on US ebay not just UK ebay, I'd probably have got much more, I realise now, and the value goes up and up.
