I went through a few packets of Staxyn samples. No side effects, but nothing "substantive" either. That said, I am working with a "no-nerves spared" Da Vinci surgery.
No idea what they might cost - I beg samples at each visit, and keep them until I get enough to do a week or more with the same pill. I get a lot of samples, but then I see my uro and GP a lot, so that may not be a good thing.
I can speak to my daily Cialis. We are in the $25+ territory per 20mg pill these days (retail US).