Hello,
I think the sprites are very cute and very overpriced - you need CHF 400 for a sprite, or CHF 2,000 if you're a fan! - if you're a fan! And you can't get them any other way?
I'm alone with two children and my food budget is between CHF 250 and CHF 400 a month. So with a bit of luck I could get one... but I don't think it's right for Migros to make plush toys so expensive!
For your information, Coop charges CHF 10 per stamp, which seems a bit more reasonable to me, especially as you can also buy them at half or full price if you can't afford the stamps...