I think that cage enrichment and allowing an animal to express their natural instincts is important. I'd like to see scavenging/foraging toys on the market - and ways to make it more of a challenge for hamsters to get their bedding material rather than for them to just have to move it from one corner to another.
It would be great if there were long sticks (yknow like the dog chews) for hamsters to chew, maybe meat flavour? i think they can have dog ones im not too sure, but even so ;D
Similar to what mangoandmimi said, meat flavoured biscuits designed for hamsters (maybe with natural ingredients such as oats and seeds mixed it)
I think for a resonable sized packet (say 150g) £2-£3
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Love from Mel and the ham hams xxx