Ah yes, the "joke sellers" as I call them. I take it they're flogging off the likes of the Mobile Fidelity releases for that money? Go back in six months and you can put money on that title still being there.
My SACD only copy of Billy Joel's The Stranger was about a tenner off Amazon. Another disc from classical label BIS has 4 hours worth of music on the one disc, think that was less than £15. Tons of others, you just need to shop around. You'll pay through the nose for any discs if you try hard enough, but there's plenty of outlets out there with SACDs for cheap prices. I bought all my Rolling Stones SACDs (got most of them) for less than a tenner and that includes the triple-disc London Years set and the two disc compilations as well. Think Flowers was the most expensive, but even then that was a tenner and still sealed.
It's kind of an odd question - is there any point in buying a SACD player. You either get one or you don't - like I say, there's no shortage of discs and classical can be a real boon. I bought a six SACD-disc LSO set for under £15 on Amazon last year. Look around enough and you'll land the deals alright.