I do a lot of cross series trades to collect old series. But for such trades, you need only cards from the OoP series. Also, to make the best offer, you need to open a user profile page to get additional info.
So I decided to write a userscript which helps me with trading.
It provides the following things:
Series type filter
Adds 5 additional option for filtering series by its type:
Series with an infinite number of cards.
Series with a fixed number of cards, it also includes out of print series.
Free Packs Available
Series, where free packs still available.
Any Packs Available
Series, where any packs available, regardless of is it free or paid.
Out of Print Series
Series, where no available packs.
Adds button for quick reset a chosen series without scrolling or moving scrollbars.
Adds a line with the progress of your and partner’s collection. It allows you to estimate partner interest in cards from this series.
Links to series and collections
Turns series name to a link to it.
Collection progress also is a link to the collection.
Buttons to select a series
Button to set a series as chosen to check out other cards from this series.
Button to filter out a series
It allows you to hide series, and it’s useful for hiding of big spamming series.
Last activity of the partner
How far ago the partner did something.
Note that means the last public activity but not the last site visit.
How to get the usercript
To use usercript, you need an appropriate extension. I recommend Tampermonkey (Chrome Webstore, Firefox Add-ons).
Then you need to download the userscript and the extension automatically offers you install it.