I have a set of those bad boys at home. They are in a terrible condition because some of the tips has fallen off *looks over* and there's like... 7 missing, but even after 7 years they are still fully functional and haven't dried out. It's definitely worth investing into a pack, even if it's basic colour scheme.

I would offer you mine since I'm getting another, but they are so scummy looking it's actually embarrassing. xD I mean I can give you my set, If you don't mind having a few colours missing and probably catching a few man unknown diseases from it. You decide. It's going in the bin after Christmas anyway. I'm getting a new one.