I read warnigs of people choosing cheaper covid tests and not getting the results back, or not in time. Reports of web sites with low prices that, just like cheap air fares are NOT cheap. The UK govt has had to back pedal on some of the companies and prices they have espoused were cheaper, when user feedback pointed out the significant problems. I have not linked the articles but careful research is needed. I have no doubt that many are charging exhorbitant prices but if you don't get an accurate test, when you need it?