Junk or Good Ones? A couple of places might include Meritline and Supermediastore. There are tons of others - I guess that's what Google Searches are for....
I rarely use D/L but I buy them at Newegg........20 Pack runs about $40 US w/shipping. You can probably find a better price though. I get them there because I make a couple of orders a week and it's handy.
Buy Verbatim... Today, best DVD+R DL media is Verbatim priced at $1.70 each in 20 packs at newegg.com ....meritline 100 packs are priced $2.00 each for for same product..that's all I checked, there may be better deals...check Best Buy & Office Max for on-sale deals.