Sperm bank?

My husband and I have been trying to have a baby for almost 8 yrs now with no success. We tried many IUI procedures but they completely useless as my husband's sperm count and motility is very low. The next solution is IVF or sperm doners. Can't afford IVF so we are wondering how safe the sperm is from the bank. I know that the doners provide a family/ medical history but how can anyone know if they are lying? I find it kind of risky? Any advice..plz help!!!