I am a collector of magic the gathering and have yet to find a spot that includes the set of Collector's Edition as an option for the cards that are in that set. Is there any way to get collector's edition added on here as well?

I have also noticed a few more missing- they are Deckmasters set, most promo cards and other special cards(FNM, Tour cards, Judge cards). Also is there anyway to get the alternate art added? I guess i am talking about the older cards that have that.

If there isnt any way to get it added in, is there anyway for me to adjust the price of the cards? I know that collector's edition of black lotus is not more than a couple hundred for example.

This comes up pretty frequently.. This site right now only reflects what's in the official WOTC Gatherer website. I think they are looking at adding in imports from other sources, but it isn't done yet.