I'd love to use them more often, but they have become quite expensive 
This does not make any sense whatsoever, does it? Unless maybe you've found a place where the price is stable in BTC. I haven't found one, yet.
Also, I think they're dirt-cheap! Like, 100.000.000 Staoshi for just 120$! Holy hell that's a bargain like I've never seen one before. It's almost like they're giving away free money!
(That last part was a joke, but I hope you get my point. It's all relative. Bitcoin is expensive compared to what exactly, according to you?)