To be honest, daggers haven't changed that much in a year or so.
Here's my interpretation of the current market, although some of these are liable to be even thousands off, it gives a reasonable indication of current prices.
You'll notice level 50's have less value than 45's or 55's as this is the most commonly skipped level, either you MQ with a level 50 dagger or you use a 55, in many instances you do not get both, level 55's are generally preferred seeing they deal more damage and use prof better.
Prices are higher the closer they are to max ee, hence why the level 25 with 160ee is worth 4k more than the level 30 with 160ee.
I'm not saying these prices are fully accurate, but a general indication of where prices are at roughly. Better off doing a price check on an item at the time of purchase.