I am going to repeat my usual rant about bags for the umpteenth time - cheap bags are a waste of money in the long run.

I fully agree with this sentiment. As soon as you know you're hooked on camping and backpacking for life it pays to buy a high quality bag. Always. As soon as you can.

The great difficulty for a newbie is knowing if there will be a long run or not. Sleeping bags are harder to borrow or rent than tents or packs, because their users get a lot more intimate with them. Buying a bag is often the only way to get started.

For those who have very little money, newbie or not, a cheap bag that lets you get out camping is not a waste of money, if the alternative is not getting out because you cannot raise the money for a good bag. Even $200 for used bag is a HUGE stretch for some people.

So, there are some qualifications to consider. Otherwise, I agree with your rant.