I couldn't find the 3.99 versions of the dvd's, just the $20 versions. If these dvds give you significant breakthroughs in understanding then I feel they could be worth spending the money on.
you no doubt know about dark source and hands on dark basic pro books which are available here.
I feel for the price you may get better value per subject from these books and the code source bank. though I do no personally own them yet(I do plan to buy the two dark basic books when I have the spare cash)
whatever works for you is good. Just remember there is free help through the dark basic forum, which for me has been more than helpful. (thank-you everyone) If you get these videos please let us know how you go with them, I may be interested in them too if the value for money is there.
kezzla
Sometimes I like to use words out of contents