I think you're making a mistake, or there is an error in Glyde's system for whatever particular game you are looking at. What Glyde charges for a game is the price you set the game at. So, if you set the price at $30, that's what Glyde charges, assuming your game is the first to sell. Perhaps, you're trying to list a game at a lesser condition than the one that is listed for $10, which could be why they won't let you charge more than $4.
I don't believe I made any errors in my calculations, as I tried this with several games. Strangely, anywhere from $3.00-$5.00 went missing from the "buyer's price" and the "seller's price" on each game I tried.
Perhaps it was just a fluke, but I made sure the prices were the same for "new" titles for both buyers and sellers.
Don't believe me? Check the following links and see for yourself.
Game: "Aly and Aj Adventure" (NDS)
To Buy - "NEW"http://glyde.com/#!v...ly-AJ-Adventure
To Sell - "NEW"http://glyde.com/sel...search_key=1837
Game: "Halo Reach" Standard Edition (X360)
To Buy - "NEW"http://glyde.com/#!v...4160/Halo-Reach
To Sell - "NEW"http://glyde.com/sel.../glu_id=7974160
Madden NFL 2002 (PS2)
To Buy - "NEW"http://glyde.com/#!v...Madden-NFL-2002
To Sell - "NEW"http://glyde.com/sel.../glu_id=7952522
Batman Arkham Asylum : Standard Edition (X360)
To Buy - "NEW"http://glyde.com/#!v...n-Arkham-Asylum
To Sell - "NEW"http://glyde.com/sel.../glu_id=7973295
(Additionally, you can't even sell or buy the "Game Of The Year" versions of Batman Arkham Asylum" on Glyde)
I just tried those games because each title fell into a specific category;
1) Common, somewhat of a new release, easy to find and popular (Halo Reach)
2) Common, old release (over 1 year old), easy to find and popular (Batman Arkham Asylum)
3) Uncommon, old release (over 1-2 years old), discontinued/discounted almost everywhere and not too popular (Aly & AJ Adventure)
4) Common, really old release (over 7 years old), discontinued/discounted almost everywhere and not popular at all (Madden NFL 2002)
I tried to make a most educated guess on the types of games to choose, based on what titles most game players would have played or at least heard of.
If you still don't believe me, try comparing prices yourself. I have seen the proof so I am definitely questioning how Glyde's pricing structure works.