Is it best to reg new domain names and try to sell them, or best to buy already reg domain names and resell??
Unless you are very experienced, you are not going to find anything still available in 2013, that is bound to sell for a significant profit.
I hardly register domains any more, when I do it's for development - I'm not expecting that they will ever sell.
The aftermarket is where quality domains are to be found, but you need to understand what to buy, and what NOT to buy.
The domains you bought were pretty bad, but there are millions of other domains on sale, many of which are better (or less bad). On the other hand there are NOT millions of buyers. More than 99% of all domains are worthless, so you'll need to own (acquire) those that somebody would want.
But the vast majority of domainers are domain collectors, and losing money. It's not like you are the exception.
Do you have any idea of how many people actually make a living doing this ? Very very few. The icons of the industry such as Rick S. Or Frank S. are not representative at all.
PS: ignore appraisals, especially automated/paid appraisals.