I have found bricks of tally ho cards on ebay for around $20 as well, they are similar enough to bicycle cards in quality but have different enough backs to not look like the same decks kept in everyones junk drawer.

The circle back designs even have an extra, magician friendly, feature.

One way backs, if you know where to look?

That's the one, It's subtle enough that I rarely use it but it comes in handy for some off the cuff work.