Eschewing insurance in favor of joining "a nationwide network of Christians who save money by sharing each other's medical bills" may not bring on the wrath of the the IRS -- but there could be punishing bills from medical providers.
Getting "a good stereo" was one of those rites of passage into adulthood when I was young. You got your own place, and the stereo was usually the highest priority after a bed and things to make food with. Sometimes higher. No more.
Best Buy is a retailer that so far has missed a structural change that may make its business obsolete. It is only cheap if the "E" projected for next year will be there. So far the market is betting that it won't, and I have no insight that encourages me to disagree with the market.