All dread mares are worth big bucks now since they don't spawn anymore. You are looking at 5-10 mil for a standard less than 600 HP dread. High end ones 25+.Neither one of those is a terrible horse but neither is in the "uber" category, i would say maybe 2-3mil for the first and posibly 3-4m for the second(you should train that one up lower HP but its a better pet).
the problem with them is there physical resist is low that caps at about 75, fire caps at 40 (if i remember) and there pretty close with the rest of them.
The 140mana on the second is very nice and once its magery and eval trains up it should bless to about 650hp.
Edit: I have seen a dread go for 10mil some as low as 500k
Magery is definately slow.. I worked one of mine up to 93 and the other to like 85. Probably worth the time to get them to GM, I've seen some dreads melee hit, fire breath, exp/fs/fs in a matter of a few seconds.These Horses are Godly and i live em..I have a 640 as my main and a 634 under him..I love to use them with a Nightmare or a bake.....Too bad they stopped spawning cause this is by far the most powerful pet in the game next to a greater i think....Has anybody had a hard time training their magery skill up?...Man both mine are taking forever to gm...I usually dig a shadow ele up and sit on a boat with mine and let him cast away on the ele...only problem is he runs outta mana kinda quickly...