Mineral chews are not good for hamsters,nor would they be necessary with a good diet
Have you tried something like a dried grass toy?I know that there are some really affordable small ones from most pet stores which can go down well with some hamsters.
Dog biscuits can be good if you get ones that are completely safe and actually healthy,with no biproducts or questionable ingredients or unsafe ingredients of course.I personally just go to Dollar General and get chicken flavored Ever Pet biscuits,as the ingredients are shockingly enough superior to Milk Bones with not having biproducts or unsafe preservatives.
Loofah is nice,but not all hamsters enjoy it.I also offer raffia by itself or attached to other toys,and this is fairly affordable since you can get it at Dollar Tree for three bundles that are just all natural raffia.Dandelion root can be good as well but it would need to be ordered online,though it can be ordered off Viovet if you wanted to do a big order and perhaps find some interesting treats and toys!