Civilization V: Complete Edition

So, about a year ago I head 30$ of spare money and bought this cool "Civilization V" game. Now, after playing a ton of what vanilla had to offer, I came to look for mods and discovered I've been missing on a huge part of the game by not having the DLCs. I looked at the options for buying them and realized I've probably screwed stuff up.

Buying Civ V vanilla and one of the major expansions separately (without sale) costs 10$ more than buying Civ V vanilla and ALL the DLCs, major and minor, through the Complete Edition. If I were to buy the Complete Edition while I already have the base game, is it a waste of a Civ V vanilla game code or is it usable for trade/gifting to a friend later?

Thank you for trying to understand my situation!

Sadly, the original code will be wasted; however, the complete edition is a better buy than purchasing the expansions and DLC separately. Complete Edition $12.50 at DLgamer http://www.dlgamer.us/download-civilization_5_the_complete-pc_games-p-22569.html

There is also no other game that is more often on Steam sale than Civ5, usally with 75% (which is 9.99 for the CE).

The last Civ-sale was just 2 weeks ago, so maybe you can find someone who will trade the stuff you need?

Tore_darc said:

Sadly, the original code will be wasted; however, the complete edition is a better buy than purchasing the expansions and DLC separately. Complete Edition $12.50 at DLgamer http://www.dlgamer.us/download-civilization_5_the_complete-pc_games-p-22569.html

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I saw this offer some days ago but I've never bought anything outside from Steam. Is DLGamer trustworthy?